wp/wp-admin/includes/class-wp-upgrader.php
changeset 7 cf61fcea0001
parent 5 5e2f62d02dcd
child 9 177826044cd9
equal deleted inserted replaced
6:490d5cc509ed 7:cf61fcea0001
     1 <?php
     1 <?php
     2 /**
     2 /**
     3  * A File upgrader class for WordPress.
     3  * Upgrade API: WP_Upgrader class
     4  *
     4  *
     5  * This set of classes are designed to be used to upgrade/install a local set of files on the filesystem via the Filesystem Abstraction classes.
     5  * Requires skin classes and WP_Upgrader subclasses for backward compatibility.
     6  *
       
     7  * @link https://core.trac.wordpress.org/ticket/7875 consolidate plugin/theme/core upgrade/install functions
       
     8  *
     6  *
     9  * @package WordPress
     7  * @package WordPress
    10  * @subpackage Upgrader
     8  * @subpackage Upgrader
    11  * @since 2.8.0
     9  * @since 2.8.0
    12  */
    10  */
    13 
    11 
    14 require ABSPATH . 'wp-admin/includes/class-wp-upgrader-skins.php';
    12 /** WP_Upgrader_Skin class */
       
    13 require_once ABSPATH . 'wp-admin/includes/class-wp-upgrader-skin.php';
       
    14 
       
    15 /** Plugin_Upgrader_Skin class */
       
    16 require_once ABSPATH . 'wp-admin/includes/class-plugin-upgrader-skin.php';
       
    17 
       
    18 /** Theme_Upgrader_Skin class */
       
    19 require_once ABSPATH . 'wp-admin/includes/class-theme-upgrader-skin.php';
       
    20 
       
    21 /** Bulk_Upgrader_Skin class */
       
    22 require_once ABSPATH . 'wp-admin/includes/class-bulk-upgrader-skin.php';
       
    23 
       
    24 /** Bulk_Plugin_Upgrader_Skin class */
       
    25 require_once ABSPATH . 'wp-admin/includes/class-bulk-plugin-upgrader-skin.php';
       
    26 
       
    27 /** Bulk_Theme_Upgrader_Skin class */
       
    28 require_once ABSPATH . 'wp-admin/includes/class-bulk-theme-upgrader-skin.php';
       
    29 
       
    30 /** Plugin_Installer_Skin class */
       
    31 require_once ABSPATH . 'wp-admin/includes/class-plugin-installer-skin.php';
       
    32 
       
    33 /** Theme_Installer_Skin class */
       
    34 require_once ABSPATH . 'wp-admin/includes/class-theme-installer-skin.php';
       
    35 
       
    36 /** Language_Pack_Upgrader_Skin class */
       
    37 require_once ABSPATH . 'wp-admin/includes/class-language-pack-upgrader-skin.php';
       
    38 
       
    39 /** Automatic_Upgrader_Skin class */
       
    40 require_once ABSPATH . 'wp-admin/includes/class-automatic-upgrader-skin.php';
       
    41 
       
    42 /** WP_Ajax_Upgrader_Skin class */
       
    43 require_once ABSPATH . 'wp-admin/includes/class-wp-ajax-upgrader-skin.php';
    15 
    44 
    16 /**
    45 /**
    17  * WordPress Upgrader class for Upgrading/Installing a local set of files via the Filesystem Abstraction classes from a Zip file.
    46  * Core class used for upgrading/installing a local set of files via
       
    47  * the Filesystem Abstraction classes from a Zip file.
    18  *
    48  *
    19  * @package WordPress
       
    20  * @subpackage Upgrader
       
    21  * @since 2.8.0
    49  * @since 2.8.0
    22  */
    50  */
    23 class WP_Upgrader {
    51 class WP_Upgrader {
    24 
    52 
    25 	/**
    53 	/**
    26 	 * The error/notification strings used to update the user on the progress.
    54 	 * The error/notification strings used to update the user on the progress.
    27 	 *
    55 	 *
    28 	 * @since 2.8.0
    56 	 * @since 2.8.0
    29 	 * @var string $strings
    57 	 * @var array $strings
    30 	 */
    58 	 */
    31 	public $strings = array();
    59 	public $strings = array();
    32 
    60 
    33 	/**
    61 	/**
    34 	 * The upgrader skin being used.
    62 	 * The upgrader skin being used.
    35 	 *
    63 	 *
    36 	 * @since 2.8.0
    64 	 * @since 2.8.0
    37 	 * @var WP_Upgrader_Skin $skin
    65 	 * @var Automatic_Upgrader_Skin|WP_Upgrader_Skin $skin
    38 	 */
    66 	 */
    39 	public $skin = null;
    67 	public $skin = null;
    40 
    68 
    41 	/**
    69 	/**
    42 	 * The result of the installation.
    70 	 * The result of the installation.
    43 	 *
    71 	 *
    44 	 * This is set by {@see WP_Upgrader::install_package()}, only when the package is installed
    72 	 * This is set by WP_Upgrader::install_package(), only when the package is installed
    45 	 * successfully. It will then be an array, unless a {@see WP_Error} is returned by the
    73 	 * successfully. It will then be an array, unless a WP_Error is returned by the
    46 	 * {@see 'upgrader_post_install'} filter. In that case, the `WP_Error` will be assigned to
    74 	 * {@see 'upgrader_post_install'} filter. In that case, the WP_Error will be assigned to
    47 	 * it.
    75 	 * it.
    48 	 *
    76 	 *
    49 	 * @since 2.8.0
    77 	 * @since 2.8.0
       
    78 	 *
    50 	 * @var WP_Error|array $result {
    79 	 * @var WP_Error|array $result {
    51 	 *      @type string $source             The full path to the source the files were installed from.
    80 	 *      @type string $source             The full path to the source the files were installed from.
    52 	 *      @type string $source_files       List of all the files in the source directory.
    81 	 *      @type string $source_files       List of all the files in the source directory.
    53 	 *      @type string $destination        The full path to the install destination folder.
    82 	 *      @type string $destination        The full path to the installation destination folder.
    54 	 *      @type string $destination_name   The name of the destination folder, or empty if `$destination`
    83 	 *      @type string $destination_name   The name of the destination folder, or empty if `$destination`
    55 	 *                                       and `$local_destination` are the same.
    84 	 *                                       and `$local_destination` are the same.
    56 	 *      @type string $local_destination  The full local path to the destination folder. This is usually
    85 	 *      @type string $local_destination  The full local path to the destination folder. This is usually
    57 	 *                                       the same as `$destination`.
    86 	 *                                       the same as `$destination`.
    58 	 *      @type string $remote_destination The full remote path to the destination folder
    87 	 *      @type string $remote_destination The full remote path to the destination folder
    85 	/**
   114 	/**
    86 	 * Construct the upgrader with a skin.
   115 	 * Construct the upgrader with a skin.
    87 	 *
   116 	 *
    88 	 * @since 2.8.0
   117 	 * @since 2.8.0
    89 	 *
   118 	 *
    90 	 * @param WP_Upgrader_Skin $skin The upgrader skin to use. Default is a {@see WP_Upgrader_Skin}
   119 	 * @param WP_Upgrader_Skin $skin The upgrader skin to use. Default is a WP_Upgrader_Skin.
    91 	 *                               instance.
   120 	 *                               instance.
    92 	 */
   121 	 */
    93 	public function __construct( $skin = null ) {
   122 	public function __construct( $skin = null ) {
    94 		if ( null == $skin )
   123 		if ( null == $skin )
    95 			$this->skin = new WP_Upgrader_Skin();
   124 			$this->skin = new WP_Upgrader_Skin();
   114 	 * Add the generic strings to WP_Upgrader::$strings.
   143 	 * Add the generic strings to WP_Upgrader::$strings.
   115 	 *
   144 	 *
   116 	 * @since 2.8.0
   145 	 * @since 2.8.0
   117 	 */
   146 	 */
   118 	public function generic_strings() {
   147 	public function generic_strings() {
   119 		$this->strings['bad_request'] = __('Invalid Data provided.');
   148 		$this->strings['bad_request'] = __('Invalid data provided.');
   120 		$this->strings['fs_unavailable'] = __('Could not access filesystem.');
   149 		$this->strings['fs_unavailable'] = __('Could not access filesystem.');
   121 		$this->strings['fs_error'] = __('Filesystem error.');
   150 		$this->strings['fs_error'] = __('Filesystem error.');
   122 		$this->strings['fs_no_root_dir'] = __('Unable to locate WordPress Root directory.');
   151 		$this->strings['fs_no_root_dir'] = __('Unable to locate WordPress root directory.');
   123 		$this->strings['fs_no_content_dir'] = __('Unable to locate WordPress Content directory (wp-content).');
   152 		$this->strings['fs_no_content_dir'] = __('Unable to locate WordPress content directory (wp-content).');
   124 		$this->strings['fs_no_plugins_dir'] = __('Unable to locate WordPress Plugin directory.');
   153 		$this->strings['fs_no_plugins_dir'] = __('Unable to locate WordPress plugin directory.');
   125 		$this->strings['fs_no_themes_dir'] = __('Unable to locate WordPress Theme directory.');
   154 		$this->strings['fs_no_themes_dir'] = __('Unable to locate WordPress theme directory.');
   126 		/* translators: %s: directory name */
   155 		/* translators: %s: directory name */
   127 		$this->strings['fs_no_folder'] = __('Unable to locate needed folder (%s).');
   156 		$this->strings['fs_no_folder'] = __('Unable to locate needed folder (%s).');
   128 
   157 
   129 		$this->strings['download_failed'] = __('Download failed.');
   158 		$this->strings['download_failed'] = __('Download failed.');
   130 		$this->strings['installing_package'] = __('Installing the latest version&#8230;');
   159 		$this->strings['installing_package'] = __('Installing the latest version&#8230;');
   131 		$this->strings['no_files'] = __('The package contains no files.');
   160 		$this->strings['no_files'] = __('The package contains no files.');
   132 		$this->strings['folder_exists'] = __('Destination folder already exists.');
   161 		$this->strings['folder_exists'] = __('Destination folder already exists.');
   133 		$this->strings['mkdir_failed'] = __('Could not create directory.');
   162 		$this->strings['mkdir_failed'] = __('Could not create directory.');
   134 		$this->strings['incompatible_archive'] = __('The package could not be installed.');
   163 		$this->strings['incompatible_archive'] = __('The package could not be installed.');
       
   164 		$this->strings['files_not_writable'] = __( 'The update cannot be installed because we will be unable to copy some files. This is usually due to inconsistent file permissions.' );
   135 
   165 
   136 		$this->strings['maintenance_start'] = __('Enabling Maintenance mode&#8230;');
   166 		$this->strings['maintenance_start'] = __('Enabling Maintenance mode&#8230;');
   137 		$this->strings['maintenance_end'] = __('Disabling Maintenance mode&#8230;');
   167 		$this->strings['maintenance_end'] = __('Disabling Maintenance mode&#8230;');
   138 	}
   168 	}
   139 
   169 
   140 	/**
   170 	/**
   141 	 * Connect to the filesystem.
   171 	 * Connect to the filesystem.
   142 	 *
   172 	 *
   143 	 * @since 2.8.0
   173 	 * @since 2.8.0
   144 	 *
   174 	 *
       
   175 	 * @global WP_Filesystem_Base $wp_filesystem Subclass
       
   176 	 *
   145 	 * @param array $directories                  Optional. A list of directories. If any of these do
   177 	 * @param array $directories                  Optional. A list of directories. If any of these do
   146 	 *                                            not exist, a {@see WP_Error} object will be returned.
   178 	 *                                            not exist, a WP_Error object will be returned.
   147 	 *                                            Default empty array.
   179 	 *                                            Default empty array.
   148 	 * @param bool  $allow_relaxed_file_ownership Whether to allow relaxed file ownership.
   180 	 * @param bool  $allow_relaxed_file_ownership Whether to allow relaxed file ownership.
   149 	 *                                            Default false.
   181 	 *                                            Default false.
   150 	 * @return bool|WP_Error True if able to connect, false or a {@see WP_Error} otherwise.
   182 	 * @return bool|WP_Error True if able to connect, false or a WP_Error otherwise.
   151 	 */
   183 	 */
   152 	public function fs_connect( $directories = array(), $allow_relaxed_file_ownership = false ) {
   184 	public function fs_connect( $directories = array(), $allow_relaxed_file_ownership = false ) {
   153 		global $wp_filesystem;
   185 		global $wp_filesystem;
   154 
   186 
   155 		if ( false === ( $credentials = $this->skin->request_filesystem_credentials( false, $directories[0], $allow_relaxed_file_ownership ) ) ) {
   187 		if ( false === ( $credentials = $this->skin->request_filesystem_credentials( false, $directories[0], $allow_relaxed_file_ownership ) ) ) {
   203 	 *
   235 	 *
   204 	 * @since 2.8.0
   236 	 * @since 2.8.0
   205 	 *
   237 	 *
   206 	 * @param string $package The URI of the package. If this is the full path to an
   238 	 * @param string $package The URI of the package. If this is the full path to an
   207 	 *                        existing local file, it will be returned untouched.
   239 	 *                        existing local file, it will be returned untouched.
   208 	 * @return string|WP_Error The full path to the downloaded package file, or a {@see WP_Error} object.
   240 	 * @return string|WP_Error The full path to the downloaded package file, or a WP_Error object.
   209 	 */
   241 	 */
   210 	public function download_package( $package ) {
   242 	public function download_package( $package ) {
   211 
   243 
   212 		/**
   244 		/**
   213 		 * Filter whether to return the package.
   245 		 * Filters whether to return the package.
   214 		 *
   246 		 *
   215 		 * @since 3.7.0
   247 		 * @since 3.7.0
   216 		 *
   248 		 *
   217 		 * @param bool        $reply   Whether to bail without returning the package.
   249 		 * @param bool        $reply   Whether to bail without returning the package.
   218 		 *                             Default false.
   250 		 *                             Default false.
   242 	/**
   274 	/**
   243 	 * Unpack a compressed package file.
   275 	 * Unpack a compressed package file.
   244 	 *
   276 	 *
   245 	 * @since 2.8.0
   277 	 * @since 2.8.0
   246 	 *
   278 	 *
       
   279 	 * @global WP_Filesystem_Base $wp_filesystem Subclass
       
   280 	 *
   247 	 * @param string $package        Full path to the package file.
   281 	 * @param string $package        Full path to the package file.
   248 	 * @param bool   $delete_package Optional. Whether to delete the package file after attempting
   282 	 * @param bool   $delete_package Optional. Whether to delete the package file after attempting
   249 	 *                               to unpack it. Default true.
   283 	 *                               to unpack it. Default true.
   250 	 * @return string|WP_Error The path to the unpacked contents, or a {@see WP_Error} on failure.
   284 	 * @return string|WP_Error The path to the unpacked contents, or a WP_Error on failure.
   251 	 */
   285 	 */
   252 	public function unpack_package( $package, $delete_package = true ) {
   286 	public function unpack_package( $package, $delete_package = true ) {
   253 		global $wp_filesystem;
   287 		global $wp_filesystem;
   254 
   288 
   255 		$this->skin->feedback('unpack_package');
   289 		$this->skin->feedback('unpack_package');
   287 
   321 
   288 		return $working_dir;
   322 		return $working_dir;
   289 	}
   323 	}
   290 
   324 
   291 	/**
   325 	/**
       
   326 	 * Flatten the results of WP_Filesystem::dirlist() for iterating over.
       
   327 	 *
       
   328 	 * @since 4.9.0
       
   329 	 * @access protected
       
   330 	 *
       
   331 	 * @param  array  $nested_files  Array of files as returned by WP_Filesystem::dirlist()
       
   332 	 * @param  string $path          Relative path to prepend to child nodes. Optional.
       
   333 	 * @return array $files A flattened array of the $nested_files specified.
       
   334 	 */
       
   335 	protected function flatten_dirlist( $nested_files, $path = '' ) {
       
   336 		$files = array();
       
   337 
       
   338 		foreach ( $nested_files as $name => $details ) {
       
   339 			$files[ $path . $name ] = $details;
       
   340 
       
   341 			// Append children recursively
       
   342 			if ( ! empty( $details['files'] ) ) {
       
   343 				$children = $this->flatten_dirlist( $details['files'], $path . $name . '/' );
       
   344 
       
   345 				// Merge keeping possible numeric keys, which array_merge() will reindex from 0..n
       
   346 				$files = $files + $children;
       
   347 			}
       
   348 		}
       
   349 
       
   350 		return $files;
       
   351 	}
       
   352 
       
   353 	/**
       
   354 	 * Clears the directory where this item is going to be installed into.
       
   355 	 *
       
   356 	 * @since 4.3.0
       
   357 	 *
       
   358 	 * @global WP_Filesystem_Base $wp_filesystem Subclass
       
   359 	 *
       
   360 	 * @param string $remote_destination The location on the remote filesystem to be cleared
       
   361 	 * @return bool|WP_Error True upon success, WP_Error on failure.
       
   362 	 */
       
   363 	public function clear_destination( $remote_destination ) {
       
   364 		global $wp_filesystem;
       
   365 
       
   366 		$files = $wp_filesystem->dirlist( $remote_destination, true, true );
       
   367 
       
   368 		// False indicates that the $remote_destination doesn't exist.
       
   369 		if ( false === $files ) {
       
   370 			return true;
       
   371 		}
       
   372 
       
   373 		// Flatten the file list to iterate over
       
   374 		$files = $this->flatten_dirlist( $files );
       
   375 
       
   376 		// Check all files are writable before attempting to clear the destination.
       
   377 		$unwritable_files = array();
       
   378 
       
   379 		// Check writability.
       
   380 		foreach ( $files as $filename => $file_details ) {
       
   381 			if ( ! $wp_filesystem->is_writable( $remote_destination . $filename ) ) {
       
   382 				// Attempt to alter permissions to allow writes and try again.
       
   383 				$wp_filesystem->chmod( $remote_destination . $filename, ( 'd' == $file_details['type'] ? FS_CHMOD_DIR : FS_CHMOD_FILE ) );
       
   384 				if ( ! $wp_filesystem->is_writable( $remote_destination . $filename ) ) {
       
   385 					$unwritable_files[] = $filename;
       
   386 				}
       
   387 			}
       
   388 		}
       
   389 
       
   390 		if ( ! empty( $unwritable_files ) ) {
       
   391 			return new WP_Error( 'files_not_writable', $this->strings['files_not_writable'], implode( ', ', $unwritable_files ) );
       
   392 		}
       
   393 
       
   394 		if ( ! $wp_filesystem->delete( $remote_destination, true ) ) {
       
   395 			return new WP_Error( 'remove_old_failed', $this->strings['remove_old_failed'] );
       
   396 		}
       
   397 
       
   398 		return true;
       
   399 	}
       
   400 
       
   401 	/**
   292 	 * Install a package.
   402 	 * Install a package.
   293 	 *
   403 	 *
   294 	 * Copies the contents of a package form a source directory, and installs them in
   404 	 * Copies the contents of a package form a source directory, and installs them in
   295 	 * a destination directory. Optionally removes the source. It can also optionally
   405 	 * a destination directory. Optionally removes the source. It can also optionally
   296 	 * clear out the destination folder if it already exists.
   406 	 * clear out the destination folder if it already exists.
   297 	 *
   407 	 *
   298 	 * @since 2.8.0
   408 	 * @since 2.8.0
       
   409 	 *
       
   410 	 * @global WP_Filesystem_Base $wp_filesystem Subclass
       
   411 	 * @global array              $wp_theme_directories
   299 	 *
   412 	 *
   300 	 * @param array|string $args {
   413 	 * @param array|string $args {
   301 	 *     Optional. Array or string of arguments for installing a package. Default empty array.
   414 	 *     Optional. Array or string of arguments for installing a package. Default empty array.
   302 	 *
   415 	 *
   303 	 *     @type string $source                      Required path to the package source. Default empty.
   416 	 *     @type string $source                      Required path to the package source. Default empty.
   308 	 *     @type bool   $clear_working               Whether to delete the files form the working directory
   421 	 *     @type bool   $clear_working               Whether to delete the files form the working directory
   309 	 *                                               after copying to the destination. Default false.
   422 	 *                                               after copying to the destination. Default false.
   310 	 *     @type bool   $abort_if_destination_exists Whether to abort the installation if
   423 	 *     @type bool   $abort_if_destination_exists Whether to abort the installation if
   311 	 *                                               the destination folder already exists. Default true.
   424 	 *                                               the destination folder already exists. Default true.
   312 	 *     @type array  $hook_extra                  Extra arguments to pass to the filter hooks called by
   425 	 *     @type array  $hook_extra                  Extra arguments to pass to the filter hooks called by
   313 	 *                                               {@see WP_Upgrader::install_package()}. Default empty array.
   426 	 *                                               WP_Upgrader::install_package(). Default empty array.
   314 	 * }
   427 	 * }
   315 	 *
   428 	 *
   316 	 * @return array|WP_Error The result (also stored in `WP_Upgrader:$result`), or a {@see WP_Error} on failure.
   429 	 * @return array|WP_Error The result (also stored in `WP_Upgrader::$result`), or a WP_Error on failure.
   317 	 */
   430 	 */
   318 	public function install_package( $args = array() ) {
   431 	public function install_package( $args = array() ) {
   319 		global $wp_filesystem, $wp_theme_directories;
   432 		global $wp_filesystem, $wp_theme_directories;
   320 
   433 
   321 		$defaults = array(
   434 		$defaults = array(
   340 			return new WP_Error( 'bad_request', $this->strings['bad_request'] );
   453 			return new WP_Error( 'bad_request', $this->strings['bad_request'] );
   341 		}
   454 		}
   342 		$this->skin->feedback( 'installing_package' );
   455 		$this->skin->feedback( 'installing_package' );
   343 
   456 
   344 		/**
   457 		/**
   345 		 * Filter the install response before the installation has started.
   458 		 * Filters the install response before the installation has started.
   346 		 *
   459 		 *
   347 		 * Returning a truthy value, or one that could be evaluated as a WP_Error
   460 		 * Returning a truthy value, or one that could be evaluated as a WP_Error
   348 		 * will effectively short-circuit the installation, returning that value
   461 		 * will effectively short-circuit the installation, returning that value
   349 		 * instead.
   462 		 * instead.
   350 		 *
   463 		 *
   352 		 *
   465 		 *
   353 		 * @param bool|WP_Error $response   Response.
   466 		 * @param bool|WP_Error $response   Response.
   354 		 * @param array         $hook_extra Extra arguments passed to hooked filters.
   467 		 * @param array         $hook_extra Extra arguments passed to hooked filters.
   355 		 */
   468 		 */
   356 		$res = apply_filters( 'upgrader_pre_install', true, $args['hook_extra'] );
   469 		$res = apply_filters( 'upgrader_pre_install', true, $args['hook_extra'] );
       
   470 
   357 		if ( is_wp_error( $res ) ) {
   471 		if ( is_wp_error( $res ) ) {
   358 			return $res;
   472 			return $res;
   359 		}
   473 		}
   360 
   474 
   361 		//Retain the Original source and destinations
   475 		//Retain the Original source and destinations
   368 		//Locate which directory to copy to the new folder, This is based on the actual folder holding the files.
   482 		//Locate which directory to copy to the new folder, This is based on the actual folder holding the files.
   369 		if ( 1 == count( $source_files ) && $wp_filesystem->is_dir( trailingslashit( $args['source'] ) . $source_files[0] . '/' ) ) { //Only one folder? Then we want its contents.
   483 		if ( 1 == count( $source_files ) && $wp_filesystem->is_dir( trailingslashit( $args['source'] ) . $source_files[0] . '/' ) ) { //Only one folder? Then we want its contents.
   370 			$source = trailingslashit( $args['source'] ) . trailingslashit( $source_files[0] );
   484 			$source = trailingslashit( $args['source'] ) . trailingslashit( $source_files[0] );
   371 		} elseif ( count( $source_files ) == 0 ) {
   485 		} elseif ( count( $source_files ) == 0 ) {
   372 			return new WP_Error( 'incompatible_archive_empty', $this->strings['incompatible_archive'], $this->strings['no_files'] ); // There are no files?
   486 			return new WP_Error( 'incompatible_archive_empty', $this->strings['incompatible_archive'], $this->strings['no_files'] ); // There are no files?
   373 		} else { //It's only a single file, the upgrader will use the foldername of this file as the destination folder. foldername is based on zip filename.
   487 		} else { // It's only a single file, the upgrader will use the folder name of this file as the destination folder. Folder name is based on zip filename.
   374 			$source = trailingslashit( $args['source'] );
   488 			$source = trailingslashit( $args['source'] );
   375 		}
   489 		}
   376 
   490 
   377 		/**
   491 		/**
   378 		 * Filter the source file location for the upgrade package.
   492 		 * Filters the source file location for the upgrade package.
   379 		 *
   493 		 *
   380 		 * @since 2.8.0
   494 		 * @since 2.8.0
       
   495 		 * @since 4.4.0 The $hook_extra parameter became available.
   381 		 *
   496 		 *
   382 		 * @param string      $source        File source location.
   497 		 * @param string      $source        File source location.
   383 		 * @param string      $remote_source Remove file source location.
   498 		 * @param string      $remote_source Remote file source location.
   384 		 * @param WP_Upgrader $this          WP_Upgrader instance.
   499 		 * @param WP_Upgrader $this          WP_Upgrader instance.
       
   500 		 * @param array       $hook_extra    Extra arguments passed to hooked filters.
   385 		 */
   501 		 */
   386 		$source = apply_filters( 'upgrader_source_selection', $source, $remote_source, $this );
   502 		$source = apply_filters( 'upgrader_source_selection', $source, $remote_source, $this, $args['hook_extra'] );
       
   503 
   387 		if ( is_wp_error( $source ) ) {
   504 		if ( is_wp_error( $source ) ) {
   388 			return $source;
   505 			return $source;
   389 		}
   506 		}
   390 
   507 
   391 		// Has the source location changed? If so, we need a new source_files list.
   508 		// Has the source location changed? If so, we need a new source_files list.
   392 		if ( $source !== $remote_source ) {
   509 		if ( $source !== $remote_source ) {
   393 			$source_files = array_keys( $wp_filesystem->dirlist( $source ) );
   510 			$source_files = array_keys( $wp_filesystem->dirlist( $source ) );
   394 		}
   511 		}
       
   512 
   395 		/*
   513 		/*
   396 		 * Protection against deleting files in any important base directories.
   514 		 * Protection against deleting files in any important base directories.
   397 		 * Theme_Upgrader & Plugin_Upgrader also trigger this, as they pass the
   515 		 * Theme_Upgrader & Plugin_Upgrader also trigger this, as they pass the
   398 		 * destination directory (WP_PLUGIN_DIR / wp-content/themes) intending
   516 		 * destination directory (WP_PLUGIN_DIR / wp-content/themes) intending
   399 		 * to copy the directory into the directory, whilst they pass the source
   517 		 * to copy the directory into the directory, whilst they pass the source
   402 		$protected_directories = array( ABSPATH, WP_CONTENT_DIR, WP_PLUGIN_DIR, WP_CONTENT_DIR . '/themes' );
   520 		$protected_directories = array( ABSPATH, WP_CONTENT_DIR, WP_PLUGIN_DIR, WP_CONTENT_DIR . '/themes' );
   403 
   521 
   404 		if ( is_array( $wp_theme_directories ) ) {
   522 		if ( is_array( $wp_theme_directories ) ) {
   405 			$protected_directories = array_merge( $protected_directories, $wp_theme_directories );
   523 			$protected_directories = array_merge( $protected_directories, $wp_theme_directories );
   406 		}
   524 		}
       
   525 
   407 		if ( in_array( $destination, $protected_directories ) ) {
   526 		if ( in_array( $destination, $protected_directories ) ) {
   408 			$remote_destination = trailingslashit( $remote_destination ) . trailingslashit( basename( $source ) );
   527 			$remote_destination = trailingslashit( $remote_destination ) . trailingslashit( basename( $source ) );
   409 			$destination = trailingslashit( $destination ) . trailingslashit( basename( $source ) );
   528 			$destination = trailingslashit( $destination ) . trailingslashit( basename( $source ) );
   410 		}
   529 		}
   411 
   530 
   412 		if ( $clear_destination ) {
   531 		if ( $clear_destination ) {
   413 			//We're going to clear the destination if there's something there
   532 			// We're going to clear the destination if there's something there.
   414 			$this->skin->feedback('remove_old');
   533 			$this->skin->feedback('remove_old');
   415 			$removed = true;
   534 
   416 			if ( $wp_filesystem->exists( $remote_destination ) ) {
   535 			$removed = $this->clear_destination( $remote_destination );
   417 				$removed = $wp_filesystem->delete( $remote_destination, true );
       
   418 			}
       
   419 
   536 
   420 			/**
   537 			/**
   421 			 * Filter whether the upgrader cleared the destination.
   538 			 * Filters whether the upgrader cleared the destination.
   422 			 *
   539 			 *
   423 			 * @since 2.8.0
   540 			 * @since 2.8.0
   424 			 *
   541 			 *
   425 			 * @param bool   $removed            Whether the destination was cleared.
   542 			 * @param mixed  $removed            Whether the destination was cleared. true on success, WP_Error on failure
   426 			 * @param string $local_destination  The local package destination.
   543 			 * @param string $local_destination  The local package destination.
   427 			 * @param string $remote_destination The remote package destination.
   544 			 * @param string $remote_destination The remote package destination.
   428 			 * @param array  $hook_extra         Extra arguments passed to hooked filters.
   545 			 * @param array  $hook_extra         Extra arguments passed to hooked filters.
   429 			 */
   546 			 */
   430 			$removed = apply_filters( 'upgrader_clear_destination', $removed, $local_destination, $remote_destination, $args['hook_extra'] );
   547 			$removed = apply_filters( 'upgrader_clear_destination', $removed, $local_destination, $remote_destination, $args['hook_extra'] );
   431 
   548 
   432 			if ( is_wp_error($removed) ) {
   549 			if ( is_wp_error( $removed ) ) {
   433 				return $removed;
   550 				return $removed;
   434 			} elseif ( ! $removed ) {
       
   435 				return new WP_Error('remove_old_failed', $this->strings['remove_old_failed']);
       
   436 			}
   551 			}
   437 		} elseif ( $args['abort_if_destination_exists'] && $wp_filesystem->exists($remote_destination) ) {
   552 		} elseif ( $args['abort_if_destination_exists'] && $wp_filesystem->exists($remote_destination) ) {
   438 			//If we're not clearing the destination folder and something exists there already, Bail.
   553 			//If we're not clearing the destination folder and something exists there already, Bail.
   439 			//But first check to see if there are actually any files in the folder.
   554 			//But first check to see if there are actually any files in the folder.
   440 			$_files = $wp_filesystem->dirlist($remote_destination);
   555 			$_files = $wp_filesystem->dirlist($remote_destination);
   470 		}
   585 		}
   471 
   586 
   472 		$this->result = compact( 'source', 'source_files', 'destination', 'destination_name', 'local_destination', 'remote_destination', 'clear_destination' );
   587 		$this->result = compact( 'source', 'source_files', 'destination', 'destination_name', 'local_destination', 'remote_destination', 'clear_destination' );
   473 
   588 
   474 		/**
   589 		/**
   475 		 * Filter the install response after the installation has finished.
   590 		 * Filters the installation response after the installation has finished.
   476 		 *
   591 		 *
   477 		 * @since 2.8.0
   592 		 * @since 2.8.0
   478 		 *
   593 		 *
   479 		 * @param bool  $response   Install response.
   594 		 * @param bool  $response   Installation response.
   480 		 * @param array $hook_extra Extra arguments passed to hooked filters.
   595 		 * @param array $hook_extra Extra arguments passed to hooked filters.
   481 		 * @param array $result     Installation result data.
   596 		 * @param array $result     Installation result data.
   482 		 */
   597 		 */
   483 		$res = apply_filters( 'upgrader_post_install', true, $args['hook_extra'], $this->result );
   598 		$res = apply_filters( 'upgrader_post_install', true, $args['hook_extra'], $this->result );
   484 
   599 
   490 		//Bombard the calling function will all the info which we've just used.
   605 		//Bombard the calling function will all the info which we've just used.
   491 		return $this->result;
   606 		return $this->result;
   492 	}
   607 	}
   493 
   608 
   494 	/**
   609 	/**
   495 	 * Run an upgrade/install.
   610 	 * Run an upgrade/installation.
   496 	 *
   611 	 *
   497 	 * Attempts to download the package (if it is not a local file), unpack it, and
   612 	 * Attempts to download the package (if it is not a local file), unpack it, and
   498 	 * install it in the destination folder.
   613 	 * install it in the destination folder.
   499 	 *
   614 	 *
   500 	 * @since 2.8.0
   615 	 * @since 2.8.0
   512 	 *                                               directory after copying to the destination.
   627 	 *                                               directory after copying to the destination.
   513 	 *                                               Default false.
   628 	 *                                               Default false.
   514 	 *     @type bool   $abort_if_destination_exists Whether to abort the installation if the destination
   629 	 *     @type bool   $abort_if_destination_exists Whether to abort the installation if the destination
   515 	 *                                               folder already exists. When true, `$clear_destination`
   630 	 *                                               folder already exists. When true, `$clear_destination`
   516 	 *                                               should be false. Default true.
   631 	 *                                               should be false. Default true.
   517 	 *     @type bool   $is_multi                    Whether this run is one of multiple upgrade/install
   632 	 *     @type bool   $is_multi                    Whether this run is one of multiple upgrade/installation
   518 	 *                                               actions being performed in bulk. When true, the skin
   633 	 *                                               actions being performed in bulk. When true, the skin
   519 	 *                                               {@see WP_Upgrader::header()} and {@see WP_Upgrader::footer()}
   634 	 *                                               WP_Upgrader::header() and WP_Upgrader::footer()
   520 	 *                                               aren't called. Default false.
   635 	 *                                               aren't called. Default false.
   521 	 *     @type array  $hook_extra                  Extra arguments to pass to the filter hooks called by
   636 	 *     @type array  $hook_extra                  Extra arguments to pass to the filter hooks called by
   522 	 *                                               {@see WP_Upgrader::run()}.
   637 	 *                                               WP_Upgrader::run().
   523 	 * }
   638 	 * }
   524 	 *
       
   525 	 * @return array|false|WP_error The result from self::install_package() on success, otherwise a WP_Error,
   639 	 * @return array|false|WP_error The result from self::install_package() on success, otherwise a WP_Error,
   526 	 *                              or false if unable to connect to the filesystem.
   640 	 *                              or false if unable to connect to the filesystem.
   527 	 */
   641 	 */
   528 	public function run( $options ) {
   642 	public function run( $options ) {
   529 
   643 
   537 			'hook_extra' => array() // Pass any extra $hook_extra args here, this will be passed to any hooked filters.
   651 			'hook_extra' => array() // Pass any extra $hook_extra args here, this will be passed to any hooked filters.
   538 		);
   652 		);
   539 
   653 
   540 		$options = wp_parse_args( $options, $defaults );
   654 		$options = wp_parse_args( $options, $defaults );
   541 
   655 
       
   656 		/**
       
   657 		 * Filters the package options before running an update.
       
   658 		 *
       
   659 		 * See also {@see 'upgrader_process_complete'}.
       
   660 		 *
       
   661 		 * @since 4.3.0
       
   662 		 *
       
   663 		 * @param array $options {
       
   664 		 *     Options used by the upgrader.
       
   665 		 *
       
   666 		 *     @type string $package                     Package for update.
       
   667 		 *     @type string $destination                 Update location.
       
   668 		 *     @type bool   $clear_destination           Clear the destination resource.
       
   669 		 *     @type bool   $clear_working               Clear the working resource.
       
   670 		 *     @type bool   $abort_if_destination_exists Abort if the Destination directory exists.
       
   671 		 *     @type bool   $is_multi                    Whether the upgrader is running multiple times.
       
   672 		 *     @type array  $hook_extra {
       
   673 		 *         Extra hook arguments.
       
   674 		 *
       
   675 		 *         @type string $action               Type of action. Default 'update'.
       
   676 		 *         @type string $type                 Type of update process. Accepts 'plugin', 'theme', or 'core'.
       
   677 		 *         @type bool   $bulk                 Whether the update process is a bulk update. Default true.
       
   678 		 *         @type string $plugin               The base plugin path from the plugins directory.
       
   679 		 *         @type string $theme                The stylesheet or template name of the theme.
       
   680 		 *         @type string $language_update_type The language pack update type. Accepts 'plugin', 'theme',
       
   681 		 *                                            or 'core'.
       
   682 		 *         @type object $language_update      The language pack update offer.
       
   683 		 *     }
       
   684 		 * }
       
   685 		 */
       
   686 		$options = apply_filters( 'upgrader_package_options', $options );
       
   687 
   542 		if ( ! $options['is_multi'] ) { // call $this->header separately if running multiple times
   688 		if ( ! $options['is_multi'] ) { // call $this->header separately if running multiple times
   543 			$this->skin->header();
   689 			$this->skin->header();
   544 		}
   690 		}
   545 
   691 
   546 		// Connect to the Filesystem first.
   692 		// Connect to the Filesystem first.
   562 				$this->skin->footer();
   708 				$this->skin->footer();
   563 			}
   709 			}
   564 			return $res;
   710 			return $res;
   565 		}
   711 		}
   566 
   712 
   567 		//Download the package (Note, This just returns the filename of the file if the package is a local file)
   713 		/*
       
   714 		 * Download the package (Note, This just returns the filename
       
   715 		 * of the file if the package is a local file)
       
   716 		 */
   568 		$download = $this->download_package( $options['package'] );
   717 		$download = $this->download_package( $options['package'] );
   569 		if ( is_wp_error($download) ) {
   718 		if ( is_wp_error($download) ) {
   570 			$this->skin->error($download);
   719 			$this->skin->error($download);
   571 			$this->skin->after();
   720 			$this->skin->after();
   572 			if ( ! $options['is_multi'] ) {
   721 			if ( ! $options['is_multi'] ) {
   575 			return $download;
   724 			return $download;
   576 		}
   725 		}
   577 
   726 
   578 		$delete_package = ( $download != $options['package'] ); // Do not delete a "local" file
   727 		$delete_package = ( $download != $options['package'] ); // Do not delete a "local" file
   579 
   728 
   580 		//Unzips the file into a temporary directory
   729 		// Unzips the file into a temporary directory.
   581 		$working_dir = $this->unpack_package( $download, $delete_package );
   730 		$working_dir = $this->unpack_package( $download, $delete_package );
   582 		if ( is_wp_error($working_dir) ) {
   731 		if ( is_wp_error($working_dir) ) {
   583 			$this->skin->error($working_dir);
   732 			$this->skin->error($working_dir);
   584 			$this->skin->after();
   733 			$this->skin->after();
   585 			if ( ! $options['is_multi'] ) {
   734 			if ( ! $options['is_multi'] ) {
   586 				$this->skin->footer();
   735 				$this->skin->footer();
   587 			}
   736 			}
   588 			return $working_dir;
   737 			return $working_dir;
   589 		}
   738 		}
   590 
   739 
   591 		//With the given options, this installs it to the destination directory.
   740 		// With the given options, this installs it to the destination directory.
   592 		$result = $this->install_package( array(
   741 		$result = $this->install_package( array(
   593 			'source' => $working_dir,
   742 			'source' => $working_dir,
   594 			'destination' => $options['destination'],
   743 			'destination' => $options['destination'],
   595 			'clear_destination' => $options['clear_destination'],
   744 			'clear_destination' => $options['clear_destination'],
   596 			'abort_if_destination_exists' => $options['abort_if_destination_exists'],
   745 			'abort_if_destination_exists' => $options['abort_if_destination_exists'],
   601 		$this->skin->set_result($result);
   750 		$this->skin->set_result($result);
   602 		if ( is_wp_error($result) ) {
   751 		if ( is_wp_error($result) ) {
   603 			$this->skin->error($result);
   752 			$this->skin->error($result);
   604 			$this->skin->feedback('process_failed');
   753 			$this->skin->feedback('process_failed');
   605 		} else {
   754 		} else {
   606 			//Install Succeeded
   755 			// Installation succeeded.
   607 			$this->skin->feedback('process_success');
   756 			$this->skin->feedback('process_success');
   608 		}
   757 		}
   609 
   758 
   610 		$this->skin->after();
   759 		$this->skin->after();
   611 
   760 
   612 		if ( ! $options['is_multi'] ) {
   761 		if ( ! $options['is_multi'] ) {
   613 
   762 
   614 			/** This action is documented in wp-admin/includes/class-wp-upgrader.php */
   763 			/**
       
   764 			 * Fires when the upgrader process is complete.
       
   765 			 *
       
   766 			 * See also {@see 'upgrader_package_options'}.
       
   767 			 *
       
   768 			 * @since 3.6.0
       
   769 			 * @since 3.7.0 Added to WP_Upgrader::run().
       
   770 			 * @since 4.6.0 `$translations` was added as a possible argument to `$hook_extra`.
       
   771 			 *
       
   772 			 * @param WP_Upgrader $this WP_Upgrader instance. In other contexts, $this, might be a
       
   773 			 *                          Theme_Upgrader, Plugin_Upgrader, Core_Upgrade, or Language_Pack_Upgrader instance.
       
   774 			 * @param array       $hook_extra {
       
   775 			 *     Array of bulk item update data.
       
   776 			 *
       
   777 			 *     @type string $action       Type of action. Default 'update'.
       
   778 			 *     @type string $type         Type of update process. Accepts 'plugin', 'theme', 'translation', or 'core'.
       
   779 			 *     @type bool   $bulk         Whether the update process is a bulk update. Default true.
       
   780 			 *     @type array  $plugins      Array of the basename paths of the plugins' main files.
       
   781 			 *     @type array  $themes       The theme slugs.
       
   782 			 *     @type array  $translations {
       
   783 			 *         Array of translations update data.
       
   784 			 *
       
   785 			 *         @type string $language The locale the translation is for.
       
   786 			 *         @type string $type     Type of translation. Accepts 'plugin', 'theme', or 'core'.
       
   787 			 *         @type string $slug     Text domain the translation is for. The slug of a theme/plugin or
       
   788 			 *                                'default' for core translations.
       
   789 			 *         @type string $version  The version of a theme, plugin, or core.
       
   790 			 *     }
       
   791 			 * }
       
   792 			 */
   615 			do_action( 'upgrader_process_complete', $this, $options['hook_extra'] );
   793 			do_action( 'upgrader_process_complete', $this, $options['hook_extra'] );
       
   794 
   616 			$this->skin->footer();
   795 			$this->skin->footer();
   617 		}
   796 		}
   618 
   797 
   619 		return $result;
   798 		return $result;
   620 	}
   799 	}
   623 	 * Toggle maintenance mode for the site.
   802 	 * Toggle maintenance mode for the site.
   624 	 *
   803 	 *
   625 	 * Creates/deletes the maintenance file to enable/disable maintenance mode.
   804 	 * Creates/deletes the maintenance file to enable/disable maintenance mode.
   626 	 *
   805 	 *
   627 	 * @since 2.8.0
   806 	 * @since 2.8.0
       
   807 	 *
       
   808 	 * @global WP_Filesystem_Base $wp_filesystem Subclass
   628 	 *
   809 	 *
   629 	 * @param bool $enable True to enable maintenance mode, false to disable.
   810 	 * @param bool $enable True to enable maintenance mode, false to disable.
   630 	 */
   811 	 */
   631 	public function maintenance_mode( $enable = false ) {
   812 	public function maintenance_mode( $enable = false ) {
   632 		global $wp_filesystem;
   813 		global $wp_filesystem;
   641 			$this->skin->feedback('maintenance_end');
   822 			$this->skin->feedback('maintenance_end');
   642 			$wp_filesystem->delete($file);
   823 			$wp_filesystem->delete($file);
   643 		}
   824 		}
   644 	}
   825 	}
   645 
   826 
       
   827 	/**
       
   828  	 * Creates a lock using WordPress options.
       
   829  	 *
       
   830  	 * @since 4.5.0
       
   831  	 * @static
       
   832  	 *
       
   833  	 * @param string $lock_name       The name of this unique lock.
       
   834  	 * @param int    $release_timeout Optional. The duration in seconds to respect an existing lock.
       
   835 	 *                                Default: 1 hour.
       
   836  	 * @return bool False if a lock couldn't be created or if the lock is still valid. True otherwise.
       
   837  	 */
       
   838 	public static function create_lock( $lock_name, $release_timeout = null ) {
       
   839 		global $wpdb;
       
   840 		if ( ! $release_timeout ) {
       
   841 			$release_timeout = HOUR_IN_SECONDS;
       
   842 		}
       
   843 		$lock_option = $lock_name . '.lock';
       
   844 
       
   845 		// Try to lock.
       
   846 		$lock_result = $wpdb->query( $wpdb->prepare( "INSERT IGNORE INTO `$wpdb->options` ( `option_name`, `option_value`, `autoload` ) VALUES (%s, %s, 'no') /* LOCK */", $lock_option, time() ) );
       
   847 
       
   848 		if ( ! $lock_result ) {
       
   849 			$lock_result = get_option( $lock_option );
       
   850 
       
   851 			// If a lock couldn't be created, and there isn't a lock, bail.
       
   852 			if ( ! $lock_result ) {
       
   853 				return false;
       
   854 			}
       
   855 
       
   856 			// Check to see if the lock is still valid. If it is, bail.
       
   857 			if ( $lock_result > ( time() - $release_timeout ) ) {
       
   858 				return false;
       
   859 			}
       
   860 
       
   861 			// There must exist an expired lock, clear it and re-gain it.
       
   862 			WP_Upgrader::release_lock( $lock_name );
       
   863 
       
   864 			return WP_Upgrader::create_lock( $lock_name, $release_timeout );
       
   865 		}
       
   866 
       
   867 		// Update the lock, as by this point we've definitely got a lock, just need to fire the actions.
       
   868 		update_option( $lock_option, time() );
       
   869 
       
   870 		return true;
       
   871 	}
       
   872 
       
   873 	/**
       
   874  	 * Releases an upgrader lock.
       
   875  	 *
       
   876  	 * @since 4.5.0
       
   877  	 * @static
       
   878 	 *
       
   879 	 * @see WP_Upgrader::create_lock()
       
   880  	 *
       
   881  	 * @param string $lock_name The name of this unique lock.
       
   882 	 * @return bool True if the lock was successfully released. False on failure.
       
   883  	 */
       
   884 	public static function release_lock( $lock_name ) {
       
   885 		return delete_option( $lock_name . '.lock' );
       
   886 	}
       
   887 
   646 }
   888 }
   647 
   889 
   648 /**
   890 /** Plugin_Upgrader class */
   649  * Plugin Upgrader class for WordPress Plugins, It is designed to upgrade/install plugins from a local zip, remote zip URL, or uploaded zip file.
   891 require_once ABSPATH . 'wp-admin/includes/class-plugin-upgrader.php';
   650  *
   892 
   651  * @package WordPress
   893 /** Theme_Upgrader class */
   652  * @subpackage Upgrader
   894 require_once ABSPATH . 'wp-admin/includes/class-theme-upgrader.php';
   653  * @since 2.8.0
   895 
   654  */
   896 /** Language_Pack_Upgrader class */
   655 class Plugin_Upgrader extends WP_Upgrader {
   897 require_once ABSPATH . 'wp-admin/includes/class-language-pack-upgrader.php';
   656 
   898 
   657 	/**
   899 /** Core_Upgrader class */
   658 	 * Plugin upgrade result.
   900 require_once ABSPATH . 'wp-admin/includes/class-core-upgrader.php';
   659 	 *
   901 
   660 	 * @since 2.8.0
   902 /** File_Upload_Upgrader class */
   661 	 * @var array|WP_Error $result
   903 require_once ABSPATH . 'wp-admin/includes/class-file-upload-upgrader.php';
   662 	 * @see WP_Upgrader::$result
   904 
   663 	 */
   905 /** WP_Automatic_Updater class */
   664 	public $result;
   906 require_once ABSPATH . 'wp-admin/includes/class-wp-automatic-updater.php';
   665 
       
   666 	/**
       
   667 	 * Whether a bulk upgrade/install is being performed.
       
   668 	 *
       
   669 	 * @since 2.9.0
       
   670 	 * @var bool $bulk
       
   671 	 */
       
   672 	public $bulk = false;
       
   673 
       
   674 	/**
       
   675 	 * Initialize the upgrade strings.
       
   676 	 *
       
   677 	 * @since 2.8.0
       
   678 	 */
       
   679 	public function upgrade_strings() {
       
   680 		$this->strings['up_to_date'] = __('The plugin is at the latest version.');
       
   681 		$this->strings['no_package'] = __('Update package not available.');
       
   682 		$this->strings['downloading_package'] = __('Downloading update from <span class="code">%s</span>&#8230;');
       
   683 		$this->strings['unpack_package'] = __('Unpacking the update&#8230;');
       
   684 		$this->strings['remove_old'] = __('Removing the old version of the plugin&#8230;');
       
   685 		$this->strings['remove_old_failed'] = __('Could not remove the old plugin.');
       
   686 		$this->strings['process_failed'] = __('Plugin update failed.');
       
   687 		$this->strings['process_success'] = __('Plugin updated successfully.');
       
   688 		$this->strings['process_bulk_success'] = __('Plugins updated successfully.');
       
   689 	}
       
   690 
       
   691 	/**
       
   692 	 * Initialize the install strings.
       
   693 	 *
       
   694 	 * @since 2.8.0
       
   695 	 */
       
   696 	public function install_strings() {
       
   697 		$this->strings['no_package'] = __('Install package not available.');
       
   698 		$this->strings['downloading_package'] = __('Downloading install package from <span class="code">%s</span>&#8230;');
       
   699 		$this->strings['unpack_package'] = __('Unpacking the package&#8230;');
       
   700 		$this->strings['installing_package'] = __('Installing the plugin&#8230;');
       
   701 		$this->strings['no_files'] = __('The plugin contains no files.');
       
   702 		$this->strings['process_failed'] = __('Plugin install failed.');
       
   703 		$this->strings['process_success'] = __('Plugin installed successfully.');
       
   704 	}
       
   705 
       
   706 	/**
       
   707 	 * Install a plugin package.
       
   708 	 *
       
   709 	 * @since 2.8.0
       
   710 	 * @since 3.7.0 The `$args` parameter was added, making clearing the plugin update cache optional.
       
   711 	 *
       
   712 	 * @param string $package The full local path or URI of the package.
       
   713 	 * @param array  $args {
       
   714 	 *     Optional. Other arguments for installing a plugin package. Default empty array.
       
   715 	 *
       
   716 	 *     @type bool $clear_update_cache Whether to clear the plugin updates cache if successful.
       
   717 	 *                                    Default true.
       
   718 	 * }
       
   719 	 *
       
   720 	 * @return bool|WP_Error True if the install was successful, false or a WP_Error otherwise.
       
   721 	 */
       
   722 	public function install( $package, $args = array() ) {
       
   723 
       
   724 		$defaults = array(
       
   725 			'clear_update_cache' => true,
       
   726 		);
       
   727 		$parsed_args = wp_parse_args( $args, $defaults );
       
   728 
       
   729 		$this->init();
       
   730 		$this->install_strings();
       
   731 
       
   732 		add_filter('upgrader_source_selection', array($this, 'check_package') );
       
   733 
       
   734 		$this->run( array(
       
   735 			'package' => $package,
       
   736 			'destination' => WP_PLUGIN_DIR,
       
   737 			'clear_destination' => false, // Do not overwrite files.
       
   738 			'clear_working' => true,
       
   739 			'hook_extra' => array(
       
   740 				'type' => 'plugin',
       
   741 				'action' => 'install',
       
   742 			)
       
   743 		) );
       
   744 
       
   745 		remove_filter('upgrader_source_selection', array($this, 'check_package') );
       
   746 
       
   747 		if ( ! $this->result || is_wp_error($this->result) )
       
   748 			return $this->result;
       
   749 
       
   750 		// Force refresh of plugin update information
       
   751 		wp_clean_plugins_cache( $parsed_args['clear_update_cache'] );
       
   752 
       
   753 		return true;
       
   754 	}
       
   755 
       
   756 	/**
       
   757 	 * Upgrade a plugin.
       
   758 	 *
       
   759 	 * @since 2.8.0
       
   760 	 * @since 3.7.0 The `$args` parameter was added, making clearing the plugin update cache optional.
       
   761 	 *
       
   762 	 * @param string $plugin The basename path to the main plugin file.
       
   763 	 * @param array  $args {
       
   764 	 *     Optional. Other arguments for upgrading a plugin package. Defualt empty array.
       
   765 	 *
       
   766 	 *     @type bool $clear_update_cache Whether to clear the plugin updates cache if successful.
       
   767 	 *                                    Default true.
       
   768 	 * }
       
   769 	 * @return bool|WP_Error True if the upgrade was successful, false or a {@see WP_Error} object otherwise.
       
   770 	 */
       
   771 	public function upgrade( $plugin, $args = array() ) {
       
   772 
       
   773 		$defaults = array(
       
   774 			'clear_update_cache' => true,
       
   775 		);
       
   776 		$parsed_args = wp_parse_args( $args, $defaults );
       
   777 
       
   778 		$this->init();
       
   779 		$this->upgrade_strings();
       
   780 
       
   781 		$current = get_site_transient( 'update_plugins' );
       
   782 		if ( !isset( $current->response[ $plugin ] ) ) {
       
   783 			$this->skin->before();
       
   784 			$this->skin->set_result(false);
       
   785 			$this->skin->error('up_to_date');
       
   786 			$this->skin->after();
       
   787 			return false;
       
   788 		}
       
   789 
       
   790 		// Get the URL to the zip file
       
   791 		$r = $current->response[ $plugin ];
       
   792 
       
   793 		add_filter('upgrader_pre_install', array($this, 'deactivate_plugin_before_upgrade'), 10, 2);
       
   794 		add_filter('upgrader_clear_destination', array($this, 'delete_old_plugin'), 10, 4);
       
   795 		//'source_selection' => array($this, 'source_selection'), //there's a trac ticket to move up the directory for zip's which are made a bit differently, useful for non-.org plugins.
       
   796 
       
   797 		$this->run( array(
       
   798 			'package' => $r->package,
       
   799 			'destination' => WP_PLUGIN_DIR,
       
   800 			'clear_destination' => true,
       
   801 			'clear_working' => true,
       
   802 			'hook_extra' => array(
       
   803 				'plugin' => $plugin,
       
   804 				'type' => 'plugin',
       
   805 				'action' => 'update',
       
   806 			),
       
   807 		) );
       
   808 
       
   809 		// Cleanup our hooks, in case something else does a upgrade on this connection.
       
   810 		remove_filter('upgrader_pre_install', array($this, 'deactivate_plugin_before_upgrade'));
       
   811 		remove_filter('upgrader_clear_destination', array($this, 'delete_old_plugin'));
       
   812 
       
   813 		if ( ! $this->result || is_wp_error($this->result) )
       
   814 			return $this->result;
       
   815 
       
   816 		// Force refresh of plugin update information
       
   817 		wp_clean_plugins_cache( $parsed_args['clear_update_cache'] );
       
   818 
       
   819 		return true;
       
   820 	}
       
   821 
       
   822 	/**
       
   823 	 * Bulk upgrade several plugins at once.
       
   824 	 *
       
   825 	 * @since 2.8.0
       
   826 	 * @since 3.7.0 The `$args` parameter was added, making clearing the plugin update cache optional.
       
   827 	 *
       
   828 	 * @param array $plugins Array of the basename paths of the plugins' main files.
       
   829 	 * @param array $args {
       
   830 	 *     Optional. Other arguments for upgrading several plugins at once. Default empty array.
       
   831 	 *
       
   832 	 *     @type bool $clear_update_cache Whether to clear the plugin updates cache if successful.
       
   833 	 *                                    Default true.
       
   834 	 * }
       
   835 	 *
       
   836 	 * @return array|false An array of results indexed by plugin file, or false if unable to connect to the filesystem.
       
   837 	 */
       
   838 	public function bulk_upgrade( $plugins, $args = array() ) {
       
   839 
       
   840 		$defaults = array(
       
   841 			'clear_update_cache' => true,
       
   842 		);
       
   843 		$parsed_args = wp_parse_args( $args, $defaults );
       
   844 
       
   845 		$this->init();
       
   846 		$this->bulk = true;
       
   847 		$this->upgrade_strings();
       
   848 
       
   849 		$current = get_site_transient( 'update_plugins' );
       
   850 
       
   851 		add_filter('upgrader_clear_destination', array($this, 'delete_old_plugin'), 10, 4);
       
   852 
       
   853 		$this->skin->header();
       
   854 
       
   855 		// Connect to the Filesystem first.
       
   856 		$res = $this->fs_connect( array(WP_CONTENT_DIR, WP_PLUGIN_DIR) );
       
   857 		if ( ! $res ) {
       
   858 			$this->skin->footer();
       
   859 			return false;
       
   860 		}
       
   861 
       
   862 		$this->skin->bulk_header();
       
   863 
       
   864 		// Only start maintenance mode if:
       
   865 		// - running Multisite and there are one or more plugins specified, OR
       
   866 		// - a plugin with an update available is currently active.
       
   867 		// @TODO: For multisite, maintenance mode should only kick in for individual sites if at all possible.
       
   868 		$maintenance = ( is_multisite() && ! empty( $plugins ) );
       
   869 		foreach ( $plugins as $plugin )
       
   870 			$maintenance = $maintenance || ( is_plugin_active( $plugin ) && isset( $current->response[ $plugin] ) );
       
   871 		if ( $maintenance )
       
   872 			$this->maintenance_mode(true);
       
   873 
       
   874 		$results = array();
       
   875 
       
   876 		$this->update_count = count($plugins);
       
   877 		$this->update_current = 0;
       
   878 		foreach ( $plugins as $plugin ) {
       
   879 			$this->update_current++;
       
   880 			$this->skin->plugin_info = get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin, false, true);
       
   881 
       
   882 			if ( !isset( $current->response[ $plugin ] ) ) {
       
   883 				$this->skin->set_result('up_to_date');
       
   884 				$this->skin->before();
       
   885 				$this->skin->feedback('up_to_date');
       
   886 				$this->skin->after();
       
   887 				$results[$plugin] = true;
       
   888 				continue;
       
   889 			}
       
   890 
       
   891 			// Get the URL to the zip file
       
   892 			$r = $current->response[ $plugin ];
       
   893 
       
   894 			$this->skin->plugin_active = is_plugin_active($plugin);
       
   895 
       
   896 			$result = $this->run( array(
       
   897 				'package' => $r->package,
       
   898 				'destination' => WP_PLUGIN_DIR,
       
   899 				'clear_destination' => true,
       
   900 				'clear_working' => true,
       
   901 				'is_multi' => true,
       
   902 				'hook_extra' => array(
       
   903 					'plugin' => $plugin
       
   904 				)
       
   905 			) );
       
   906 
       
   907 			$results[$plugin] = $this->result;
       
   908 
       
   909 			// Prevent credentials auth screen from displaying multiple times
       
   910 			if ( false === $result )
       
   911 				break;
       
   912 		} //end foreach $plugins
       
   913 
       
   914 		$this->maintenance_mode(false);
       
   915 
       
   916 		/**
       
   917 		 * Fires when the bulk upgrader process is complete.
       
   918 		 *
       
   919 		 * @since 3.6.0
       
   920 		 *
       
   921 		 * @param Plugin_Upgrader $this Plugin_Upgrader instance. In other contexts, $this, might
       
   922 		 *                              be a Theme_Upgrader or Core_Upgrade instance.
       
   923 		 * @param array           $data {
       
   924 		 *     Array of bulk item update data.
       
   925 		 *
       
   926 		 *     @type string $action   Type of action. Default 'update'.
       
   927 		 *     @type string $type     Type of update process. Accepts 'plugin', 'theme', or 'core'.
       
   928 		 *     @type bool   $bulk     Whether the update process is a bulk update. Default true.
       
   929 		 *     @type array  $packages Array of plugin, theme, or core packages to update.
       
   930 		 * }
       
   931 		 */
       
   932 		do_action( 'upgrader_process_complete', $this, array(
       
   933 			'action' => 'update',
       
   934 			'type' => 'plugin',
       
   935 			'bulk' => true,
       
   936 			'plugins' => $plugins,
       
   937 		) );
       
   938 
       
   939 		$this->skin->bulk_footer();
       
   940 
       
   941 		$this->skin->footer();
       
   942 
       
   943 		// Cleanup our hooks, in case something else does a upgrade on this connection.
       
   944 		remove_filter('upgrader_clear_destination', array($this, 'delete_old_plugin'));
       
   945 
       
   946 		// Force refresh of plugin update information
       
   947 		wp_clean_plugins_cache( $parsed_args['clear_update_cache'] );
       
   948 
       
   949 		return $results;
       
   950 	}
       
   951 
       
   952 	/**
       
   953 	 * Check a source package to be sure it contains a plugin.
       
   954 	 *
       
   955 	 * This function is added to the {@see 'upgrader_source_selection'} filter by
       
   956 	 * {@see Plugin_Upgrader::install()}.
       
   957 	 *
       
   958 	 * @since 3.3.0
       
   959 	 *
       
   960 	 * @param string $source The path to the downloaded package source.
       
   961 	 * @return string|WP_Error The source as passed, or a {@see WP_Error} object if no plugins were found.
       
   962 	 */
       
   963 	public function check_package($source) {
       
   964 		global $wp_filesystem;
       
   965 
       
   966 		if ( is_wp_error($source) )
       
   967 			return $source;
       
   968 
       
   969 		$working_directory = str_replace( $wp_filesystem->wp_content_dir(), trailingslashit(WP_CONTENT_DIR), $source);
       
   970 		if ( ! is_dir($working_directory) ) // Sanity check, if the above fails, let's not prevent installation.
       
   971 			return $source;
       
   972 
       
   973 		// Check the folder contains at least 1 valid plugin.
       
   974 		$plugins_found = false;
       
   975 		foreach ( glob( $working_directory . '*.php' ) as $file ) {
       
   976 			$info = get_plugin_data($file, false, false);
       
   977 			if ( !empty( $info['Name'] ) ) {
       
   978 				$plugins_found = true;
       
   979 				break;
       
   980 			}
       
   981 		}
       
   982 
       
   983 		if ( ! $plugins_found )
       
   984 			return new WP_Error( 'incompatible_archive_no_plugins', $this->strings['incompatible_archive'], __( 'No valid plugins were found.' ) );
       
   985 
       
   986 		return $source;
       
   987 	}
       
   988 
       
   989 	/**
       
   990 	 * Retrieve the path to the file that contains the plugin info.
       
   991 	 *
       
   992 	 * This isn't used internally in the class, but is called by the skins.
       
   993 	 *
       
   994 	 * @since 2.8.0
       
   995 	 *
       
   996 	 * @return string|false The full path to the main plugin file, or false.
       
   997 	 */
       
   998 	public function plugin_info() {
       
   999 		if ( ! is_array($this->result) )
       
  1000 			return false;
       
  1001 		if ( empty($this->result['destination_name']) )
       
  1002 			return false;
       
  1003 
       
  1004 		$plugin = get_plugins('/' . $this->result['destination_name']); //Ensure to pass with leading slash
       
  1005 		if ( empty($plugin) )
       
  1006 			return false;
       
  1007 
       
  1008 		$pluginfiles = array_keys($plugin); //Assume the requested plugin is the first in the list
       
  1009 
       
  1010 		return $this->result['destination_name'] . '/' . $pluginfiles[0];
       
  1011 	}
       
  1012 
       
  1013 	/**
       
  1014 	 * Deactivates a plugin before it is upgraded.
       
  1015 	 *
       
  1016 	 * Hooked to the {@see 'upgrader_pre_install'} filter by {@see Plugin_Upgrader::upgrade()}.
       
  1017 	 *
       
  1018 	 * @since 2.8.0
       
  1019 	 * @since 4.1.0 Added a return value.
       
  1020 	 *
       
  1021 	 * @param bool|WP_Error  $return Upgrade offer return.
       
  1022 	 * @param array          $plugin Plugin package arguments.
       
  1023 	 * @return bool|WP_Error The passed in $return param or {@see WP_Error}.
       
  1024 	 */
       
  1025 	public function deactivate_plugin_before_upgrade($return, $plugin) {
       
  1026 
       
  1027 		if ( is_wp_error($return) ) //Bypass.
       
  1028 			return $return;
       
  1029 
       
  1030 		// When in cron (background updates) don't deactivate the plugin, as we require a browser to reactivate it
       
  1031 		if ( defined( 'DOING_CRON' ) && DOING_CRON )
       
  1032 			return $return;
       
  1033 
       
  1034 		$plugin = isset($plugin['plugin']) ? $plugin['plugin'] : '';
       
  1035 		if ( empty($plugin) )
       
  1036 			return new WP_Error('bad_request', $this->strings['bad_request']);
       
  1037 
       
  1038 		if ( is_plugin_active($plugin) ) {
       
  1039 			//Deactivate the plugin silently, Prevent deactivation hooks from running.
       
  1040 			deactivate_plugins($plugin, true);
       
  1041 		}
       
  1042 
       
  1043 		return $return;
       
  1044 	}
       
  1045 
       
  1046 	/**
       
  1047 	 * Delete the old plugin during an upgrade.
       
  1048 	 *
       
  1049 	 * Hooked to the {@see 'upgrader_clear_destination'} filter by
       
  1050 	 * {@see Plugin_Upgrader::upgrade()} and {@see Plugin_Upgrader::bulk_upgrade()}.
       
  1051 	 *
       
  1052 	 * @since 2.8.0
       
  1053 	 */
       
  1054 	public function delete_old_plugin($removed, $local_destination, $remote_destination, $plugin) {
       
  1055 		global $wp_filesystem;
       
  1056 
       
  1057 		if ( is_wp_error($removed) )
       
  1058 			return $removed; //Pass errors through.
       
  1059 
       
  1060 		$plugin = isset($plugin['plugin']) ? $plugin['plugin'] : '';
       
  1061 		if ( empty($plugin) )
       
  1062 			return new WP_Error('bad_request', $this->strings['bad_request']);
       
  1063 
       
  1064 		$plugins_dir = $wp_filesystem->wp_plugins_dir();
       
  1065 		$this_plugin_dir = trailingslashit( dirname($plugins_dir . $plugin) );
       
  1066 
       
  1067 		if ( ! $wp_filesystem->exists($this_plugin_dir) ) //If it's already vanished.
       
  1068 			return $removed;
       
  1069 
       
  1070 		// If plugin is in its own directory, recursively delete the directory.
       
  1071 		if ( strpos($plugin, '/') && $this_plugin_dir != $plugins_dir ) //base check on if plugin includes directory separator AND that it's not the root plugin folder
       
  1072 			$deleted = $wp_filesystem->delete($this_plugin_dir, true);
       
  1073 		else
       
  1074 			$deleted = $wp_filesystem->delete($plugins_dir . $plugin);
       
  1075 
       
  1076 		if ( ! $deleted )
       
  1077 			return new WP_Error('remove_old_failed', $this->strings['remove_old_failed']);
       
  1078 
       
  1079 		return true;
       
  1080 	}
       
  1081 }
       
  1082 
       
  1083 /**
       
  1084  * Theme Upgrader class for WordPress Themes, It is designed to upgrade/install themes from a local zip, remote zip URL, or uploaded zip file.
       
  1085  *
       
  1086  * @package WordPress
       
  1087  * @subpackage Upgrader
       
  1088  * @since 2.8.0
       
  1089  */
       
  1090 class Theme_Upgrader extends WP_Upgrader {
       
  1091 
       
  1092 	/**
       
  1093 	 * Result of the theme upgrade offer.
       
  1094 	 *
       
  1095 	 * @since 2.8.0
       
  1096 	 * @var array|WP_Erorr $result
       
  1097 	 * @see WP_Upgrader::$result
       
  1098 	 */
       
  1099 	public $result;
       
  1100 
       
  1101 	/**
       
  1102 	 * Whether multiple plugins are being upgraded/installed in bulk.
       
  1103 	 *
       
  1104 	 * @since 2.9.0
       
  1105 	 * @var bool $bulk
       
  1106 	 */
       
  1107 	public $bulk = false;
       
  1108 
       
  1109 	/**
       
  1110 	 * Initialize the upgrade strings.
       
  1111 	 *
       
  1112 	 * @since 2.8.0
       
  1113 	 */
       
  1114 	public function upgrade_strings() {
       
  1115 		$this->strings['up_to_date'] = __('The theme is at the latest version.');
       
  1116 		$this->strings['no_package'] = __('Update package not available.');
       
  1117 		$this->strings['downloading_package'] = __('Downloading update from <span class="code">%s</span>&#8230;');
       
  1118 		$this->strings['unpack_package'] = __('Unpacking the update&#8230;');
       
  1119 		$this->strings['remove_old'] = __('Removing the old version of the theme&#8230;');
       
  1120 		$this->strings['remove_old_failed'] = __('Could not remove the old theme.');
       
  1121 		$this->strings['process_failed'] = __('Theme update failed.');
       
  1122 		$this->strings['process_success'] = __('Theme updated successfully.');
       
  1123 	}
       
  1124 
       
  1125 	/**
       
  1126 	 * Initialize the install strings.
       
  1127 	 *
       
  1128 	 * @since 2.8.0
       
  1129 	 */
       
  1130 	public function install_strings() {
       
  1131 		$this->strings['no_package'] = __('Install package not available.');
       
  1132 		$this->strings['downloading_package'] = __('Downloading install package from <span class="code">%s</span>&#8230;');
       
  1133 		$this->strings['unpack_package'] = __('Unpacking the package&#8230;');
       
  1134 		$this->strings['installing_package'] = __('Installing the theme&#8230;');
       
  1135 		$this->strings['no_files'] = __('The theme contains no files.');
       
  1136 		$this->strings['process_failed'] = __('Theme install failed.');
       
  1137 		$this->strings['process_success'] = __('Theme installed successfully.');
       
  1138 		/* translators: 1: theme name, 2: version */
       
  1139 		$this->strings['process_success_specific'] = __('Successfully installed the theme <strong>%1$s %2$s</strong>.');
       
  1140 		$this->strings['parent_theme_search'] = __('This theme requires a parent theme. Checking if it is installed&#8230;');
       
  1141 		/* translators: 1: theme name, 2: version */
       
  1142 		$this->strings['parent_theme_prepare_install'] = __('Preparing to install <strong>%1$s %2$s</strong>&#8230;');
       
  1143 		/* translators: 1: theme name, 2: version */
       
  1144 		$this->strings['parent_theme_currently_installed'] = __('The parent theme, <strong>%1$s %2$s</strong>, is currently installed.');
       
  1145 		/* translators: 1: theme name, 2: version */
       
  1146 		$this->strings['parent_theme_install_success'] = __('Successfully installed the parent theme, <strong>%1$s %2$s</strong>.');
       
  1147 		$this->strings['parent_theme_not_found'] = __('<strong>The parent theme could not be found.</strong> You will need to install the parent theme, <strong>%s</strong>, before you can use this child theme.');
       
  1148 	}
       
  1149 
       
  1150 	/**
       
  1151 	 * Check if a child theme is being installed and we need to install its parent.
       
  1152 	 *
       
  1153 	 * Hooked to the {@see 'upgrader_post_install'} filter by {@see Theme_Upgrader::install()}.
       
  1154 	 *
       
  1155 	 * @since 3.4.0
       
  1156 	 */
       
  1157 	public function check_parent_theme_filter( $install_result, $hook_extra, $child_result ) {
       
  1158 		// Check to see if we need to install a parent theme
       
  1159 		$theme_info = $this->theme_info();
       
  1160 
       
  1161 		if ( ! $theme_info->parent() )
       
  1162 			return $install_result;
       
  1163 
       
  1164 		$this->skin->feedback( 'parent_theme_search' );
       
  1165 
       
  1166 		if ( ! $theme_info->parent()->errors() ) {
       
  1167 			$this->skin->feedback( 'parent_theme_currently_installed', $theme_info->parent()->display('Name'), $theme_info->parent()->display('Version') );
       
  1168 			// We already have the theme, fall through.
       
  1169 			return $install_result;
       
  1170 		}
       
  1171 
       
  1172 		// We don't have the parent theme, let's install it.
       
  1173 		$api = themes_api('theme_information', array('slug' => $theme_info->get('Template'), 'fields' => array('sections' => false, 'tags' => false) ) ); //Save on a bit of bandwidth.
       
  1174 
       
  1175 		if ( ! $api || is_wp_error($api) ) {
       
  1176 			$this->skin->feedback( 'parent_theme_not_found', $theme_info->get('Template') );
       
  1177 			// Don't show activate or preview actions after install
       
  1178 			add_filter('install_theme_complete_actions', array($this, 'hide_activate_preview_actions') );
       
  1179 			return $install_result;
       
  1180 		}
       
  1181 
       
  1182 		// Backup required data we're going to override:
       
  1183 		$child_api = $this->skin->api;
       
  1184 		$child_success_message = $this->strings['process_success'];
       
  1185 
       
  1186 		// Override them
       
  1187 		$this->skin->api = $api;
       
  1188 		$this->strings['process_success_specific'] = $this->strings['parent_theme_install_success'];//, $api->name, $api->version);
       
  1189 
       
  1190 		$this->skin->feedback('parent_theme_prepare_install', $api->name, $api->version);
       
  1191 
       
  1192 		add_filter('install_theme_complete_actions', '__return_false', 999); // Don't show any actions after installing the theme.
       
  1193 
       
  1194 		// Install the parent theme
       
  1195 		$parent_result = $this->run( array(
       
  1196 			'package' => $api->download_link,
       
  1197 			'destination' => get_theme_root(),
       
  1198 			'clear_destination' => false, //Do not overwrite files.
       
  1199 			'clear_working' => true
       
  1200 		) );
       
  1201 
       
  1202 		if ( is_wp_error($parent_result) )
       
  1203 			add_filter('install_theme_complete_actions', array($this, 'hide_activate_preview_actions') );
       
  1204 
       
  1205 		// Start cleaning up after the parents installation
       
  1206 		remove_filter('install_theme_complete_actions', '__return_false', 999);
       
  1207 
       
  1208 		// Reset child's result and data
       
  1209 		$this->result = $child_result;
       
  1210 		$this->skin->api = $child_api;
       
  1211 		$this->strings['process_success'] = $child_success_message;
       
  1212 
       
  1213 		return $install_result;
       
  1214 	}
       
  1215 
       
  1216 	/**
       
  1217 	 * Don't display the activate and preview actions to the user.
       
  1218 	 *
       
  1219 	 * Hooked to the {@see 'install_theme_complete_actions'} filter by
       
  1220 	 * {@see Theme_Upgrader::check_parent_theme_filter()} when installing
       
  1221 	 * a child theme and installing the parent theme fails.
       
  1222 	 *
       
  1223 	 * @since 3.4.0
       
  1224 	 *
       
  1225 	 * @param array $actions Preview actions.
       
  1226 	 */
       
  1227 	public function hide_activate_preview_actions( $actions ) {
       
  1228 		unset($actions['activate'], $actions['preview']);
       
  1229 		return $actions;
       
  1230 	}
       
  1231 
       
  1232 	/**
       
  1233 	 * Install a theme package.
       
  1234 	 *
       
  1235 	 * @since 2.8.0
       
  1236 	 * @since 3.7.0 The `$args` parameter was added, making clearing the update cache optional.
       
  1237 	 *
       
  1238 	 * @param string $package The full local path or URI of the package.
       
  1239 	 * @param array  $args {
       
  1240 	 *     Optional. Other arguments for installing a theme package. Default empty array.
       
  1241 	 *
       
  1242 	 *     @type bool $clear_update_cache Whether to clear the updates cache if successful.
       
  1243 	 *                                    Default true.
       
  1244 	 * }
       
  1245 	 *
       
  1246 	 * @return bool|WP_Error True if the install was successful, false or a {@see WP_Error} object otherwise.
       
  1247 	 */
       
  1248 	public function install( $package, $args = array() ) {
       
  1249 
       
  1250 		$defaults = array(
       
  1251 			'clear_update_cache' => true,
       
  1252 		);
       
  1253 		$parsed_args = wp_parse_args( $args, $defaults );
       
  1254 
       
  1255 		$this->init();
       
  1256 		$this->install_strings();
       
  1257 
       
  1258 		add_filter('upgrader_source_selection', array($this, 'check_package') );
       
  1259 		add_filter('upgrader_post_install', array($this, 'check_parent_theme_filter'), 10, 3);
       
  1260 
       
  1261 		$this->run( array(
       
  1262 			'package' => $package,
       
  1263 			'destination' => get_theme_root(),
       
  1264 			'clear_destination' => false, //Do not overwrite files.
       
  1265 			'clear_working' => true,
       
  1266 			'hook_extra' => array(
       
  1267 				'type' => 'theme',
       
  1268 				'action' => 'install',
       
  1269 			),
       
  1270 		) );
       
  1271 
       
  1272 		remove_filter('upgrader_source_selection', array($this, 'check_package') );
       
  1273 		remove_filter('upgrader_post_install', array($this, 'check_parent_theme_filter'));
       
  1274 
       
  1275 		if ( ! $this->result || is_wp_error($this->result) )
       
  1276 			return $this->result;
       
  1277 
       
  1278 		// Refresh the Theme Update information
       
  1279 		wp_clean_themes_cache( $parsed_args['clear_update_cache'] );
       
  1280 
       
  1281 		return true;
       
  1282 	}
       
  1283 
       
  1284 	/**
       
  1285 	 * Upgrade a theme.
       
  1286 	 *
       
  1287 	 * @since 2.8.0
       
  1288 	 * @since 3.7.0 The `$args` parameter was added, making clearing the update cache optional.
       
  1289 	 *
       
  1290 	 * @param string $theme The theme slug.
       
  1291 	 * @param array  $args {
       
  1292 	 *     Optional. Other arguments for upgrading a theme. Default empty array.
       
  1293 	 *
       
  1294 	 *     @type bool $clear_update_cache Whether to clear the update cache if successful.
       
  1295 	 *                                    Default true.
       
  1296 	 * }
       
  1297 	 * @return bool|WP_Error True if the upgrade was successful, false or a {@see WP_Error} object otherwise.
       
  1298 	 */
       
  1299 	public function upgrade( $theme, $args = array() ) {
       
  1300 
       
  1301 		$defaults = array(
       
  1302 			'clear_update_cache' => true,
       
  1303 		);
       
  1304 		$parsed_args = wp_parse_args( $args, $defaults );
       
  1305 
       
  1306 		$this->init();
       
  1307 		$this->upgrade_strings();
       
  1308 
       
  1309 		// Is an update available?
       
  1310 		$current = get_site_transient( 'update_themes' );
       
  1311 		if ( !isset( $current->response[ $theme ] ) ) {
       
  1312 			$this->skin->before();
       
  1313 			$this->skin->set_result(false);
       
  1314 			$this->skin->error( 'up_to_date' );
       
  1315 			$this->skin->after();
       
  1316 			return false;
       
  1317 		}
       
  1318 
       
  1319 		$r = $current->response[ $theme ];
       
  1320 
       
  1321 		add_filter('upgrader_pre_install', array($this, 'current_before'), 10, 2);
       
  1322 		add_filter('upgrader_post_install', array($this, 'current_after'), 10, 2);
       
  1323 		add_filter('upgrader_clear_destination', array($this, 'delete_old_theme'), 10, 4);
       
  1324 
       
  1325 		$this->run( array(
       
  1326 			'package' => $r['package'],
       
  1327 			'destination' => get_theme_root( $theme ),
       
  1328 			'clear_destination' => true,
       
  1329 			'clear_working' => true,
       
  1330 			'hook_extra' => array(
       
  1331 				'theme' => $theme,
       
  1332 				'type' => 'theme',
       
  1333 				'action' => 'update',
       
  1334 			),
       
  1335 		) );
       
  1336 
       
  1337 		remove_filter('upgrader_pre_install', array($this, 'current_before'));
       
  1338 		remove_filter('upgrader_post_install', array($this, 'current_after'));
       
  1339 		remove_filter('upgrader_clear_destination', array($this, 'delete_old_theme'));
       
  1340 
       
  1341 		if ( ! $this->result || is_wp_error($this->result) )
       
  1342 			return $this->result;
       
  1343 
       
  1344 		wp_clean_themes_cache( $parsed_args['clear_update_cache'] );
       
  1345 
       
  1346 		return true;
       
  1347 	}
       
  1348 
       
  1349 	/**
       
  1350 	 * Upgrade several themes at once.
       
  1351 	 *
       
  1352 	 * @since 3.0.0
       
  1353 	 * @since 3.7.0 The `$args` parameter was added, making clearing the update cache optional.
       
  1354 	 *
       
  1355 	 * @param array $themes The theme slugs.
       
  1356 	 * @param array $args {
       
  1357 	 *     Optional. Other arguments for upgrading several themes at once. Default empty array.
       
  1358 	 *
       
  1359 	 *     @type bool $clear_update_cache Whether to clear the update cache if successful.
       
  1360 	 *                                    Default true.
       
  1361 	 * }
       
  1362 	 * @return array[]|false An array of results, or false if unable to connect to the filesystem.
       
  1363 	 */
       
  1364 	public function bulk_upgrade( $themes, $args = array() ) {
       
  1365 
       
  1366 		$defaults = array(
       
  1367 			'clear_update_cache' => true,
       
  1368 		);
       
  1369 		$parsed_args = wp_parse_args( $args, $defaults );
       
  1370 
       
  1371 		$this->init();
       
  1372 		$this->bulk = true;
       
  1373 		$this->upgrade_strings();
       
  1374 
       
  1375 		$current = get_site_transient( 'update_themes' );
       
  1376 
       
  1377 		add_filter('upgrader_pre_install', array($this, 'current_before'), 10, 2);
       
  1378 		add_filter('upgrader_post_install', array($this, 'current_after'), 10, 2);
       
  1379 		add_filter('upgrader_clear_destination', array($this, 'delete_old_theme'), 10, 4);
       
  1380 
       
  1381 		$this->skin->header();
       
  1382 
       
  1383 		// Connect to the Filesystem first.
       
  1384 		$res = $this->fs_connect( array(WP_CONTENT_DIR) );
       
  1385 		if ( ! $res ) {
       
  1386 			$this->skin->footer();
       
  1387 			return false;
       
  1388 		}
       
  1389 
       
  1390 		$this->skin->bulk_header();
       
  1391 
       
  1392 		// Only start maintenance mode if:
       
  1393 		// - running Multisite and there are one or more themes specified, OR
       
  1394 		// - a theme with an update available is currently in use.
       
  1395 		// @TODO: For multisite, maintenance mode should only kick in for individual sites if at all possible.
       
  1396 		$maintenance = ( is_multisite() && ! empty( $themes ) );
       
  1397 		foreach ( $themes as $theme )
       
  1398 			$maintenance = $maintenance || $theme == get_stylesheet() || $theme == get_template();
       
  1399 		if ( $maintenance )
       
  1400 			$this->maintenance_mode(true);
       
  1401 
       
  1402 		$results = array();
       
  1403 
       
  1404 		$this->update_count = count($themes);
       
  1405 		$this->update_current = 0;
       
  1406 		foreach ( $themes as $theme ) {
       
  1407 			$this->update_current++;
       
  1408 
       
  1409 			$this->skin->theme_info = $this->theme_info($theme);
       
  1410 
       
  1411 			if ( !isset( $current->response[ $theme ] ) ) {
       
  1412 				$this->skin->set_result(true);
       
  1413 				$this->skin->before();
       
  1414 				$this->skin->feedback( 'up_to_date' );
       
  1415 				$this->skin->after();
       
  1416 				$results[$theme] = true;
       
  1417 				continue;
       
  1418 			}
       
  1419 
       
  1420 			// Get the URL to the zip file
       
  1421 			$r = $current->response[ $theme ];
       
  1422 
       
  1423 			$result = $this->run( array(
       
  1424 				'package' => $r['package'],
       
  1425 				'destination' => get_theme_root( $theme ),
       
  1426 				'clear_destination' => true,
       
  1427 				'clear_working' => true,
       
  1428 				'is_multi' => true,
       
  1429 				'hook_extra' => array(
       
  1430 					'theme' => $theme
       
  1431 				),
       
  1432 			) );
       
  1433 
       
  1434 			$results[$theme] = $this->result;
       
  1435 
       
  1436 			// Prevent credentials auth screen from displaying multiple times
       
  1437 			if ( false === $result )
       
  1438 				break;
       
  1439 		} //end foreach $plugins
       
  1440 
       
  1441 		$this->maintenance_mode(false);
       
  1442 
       
  1443 		/** This action is documented in wp-admin/includes/class-wp-upgrader.php */
       
  1444 		do_action( 'upgrader_process_complete', $this, array(
       
  1445 			'action' => 'update',
       
  1446 			'type' => 'theme',
       
  1447 			'bulk' => true,
       
  1448 			'themes' => $themes,
       
  1449 		) );
       
  1450 
       
  1451 		$this->skin->bulk_footer();
       
  1452 
       
  1453 		$this->skin->footer();
       
  1454 
       
  1455 		// Cleanup our hooks, in case something else does a upgrade on this connection.
       
  1456 		remove_filter('upgrader_pre_install', array($this, 'current_before'));
       
  1457 		remove_filter('upgrader_post_install', array($this, 'current_after'));
       
  1458 		remove_filter('upgrader_clear_destination', array($this, 'delete_old_theme'));
       
  1459 
       
  1460 		// Refresh the Theme Update information
       
  1461 		wp_clean_themes_cache( $parsed_args['clear_update_cache'] );
       
  1462 
       
  1463 		return $results;
       
  1464 	}
       
  1465 
       
  1466 	/**
       
  1467 	 * Check that the package source contains a valid theme.
       
  1468 	 *
       
  1469 	 * Hooked to the {@see 'upgrader_source_selection'} filter by {@see Theme_Upgrader::install()}.
       
  1470 	 * It will return an error if the theme doesn't have style.css or index.php
       
  1471 	 * files.
       
  1472 	 *
       
  1473 	 * @since 3.3.0
       
  1474 	 *
       
  1475 	 * @param string $source The full path to the package source.
       
  1476 	 * @return string|WP_Error The source or a WP_Error.
       
  1477 	 */
       
  1478 	public function check_package( $source ) {
       
  1479 		global $wp_filesystem;
       
  1480 
       
  1481 		if ( is_wp_error($source) )
       
  1482 			return $source;
       
  1483 
       
  1484 		// Check the folder contains a valid theme
       
  1485 		$working_directory = str_replace( $wp_filesystem->wp_content_dir(), trailingslashit(WP_CONTENT_DIR), $source);
       
  1486 		if ( ! is_dir($working_directory) ) // Sanity check, if the above fails, let's not prevent installation.
       
  1487 			return $source;
       
  1488 
       
  1489 		// A proper archive should have a style.css file in the single subdirectory
       
  1490 		if ( ! file_exists( $working_directory . 'style.css' ) )
       
  1491 			return new WP_Error( 'incompatible_archive_theme_no_style', $this->strings['incompatible_archive'], __( 'The theme is missing the <code>style.css</code> stylesheet.' ) );
       
  1492 
       
  1493 		$info = get_file_data( $working_directory . 'style.css', array( 'Name' => 'Theme Name', 'Template' => 'Template' ) );
       
  1494 
       
  1495 		if ( empty( $info['Name'] ) )
       
  1496 			return new WP_Error( 'incompatible_archive_theme_no_name', $this->strings['incompatible_archive'], __( "The <code>style.css</code> stylesheet doesn't contain a valid theme header." ) );
       
  1497 
       
  1498 		// If it's not a child theme, it must have at least an index.php to be legit.
       
  1499 		if ( empty( $info['Template'] ) && ! file_exists( $working_directory . 'index.php' ) )
       
  1500 			return new WP_Error( 'incompatible_archive_theme_no_index', $this->strings['incompatible_archive'], __( 'The theme is missing the <code>index.php</code> file.' ) );
       
  1501 
       
  1502 		return $source;
       
  1503 	}
       
  1504 
       
  1505 	/**
       
  1506 	 * Turn on maintenance mode before attempting to upgrade the current theme.
       
  1507 	 *
       
  1508 	 * Hooked to the {@see 'upgrader_pre_install'} filter by {@see Theme_Upgrader::upgrade()} and
       
  1509 	 * {@see Theme_Upgrader::bulk_upgrade()}.
       
  1510 	 *
       
  1511 	 * @since 2.8.0
       
  1512 	 */
       
  1513 	public function current_before($return, $theme) {
       
  1514 
       
  1515 		if ( is_wp_error($return) )
       
  1516 			return $return;
       
  1517 
       
  1518 		$theme = isset($theme['theme']) ? $theme['theme'] : '';
       
  1519 
       
  1520 		if ( $theme != get_stylesheet() ) //If not current
       
  1521 			return $return;
       
  1522 		//Change to maintenance mode now.
       
  1523 		if ( ! $this->bulk )
       
  1524 			$this->maintenance_mode(true);
       
  1525 
       
  1526 		return $return;
       
  1527 	}
       
  1528 
       
  1529 	/**
       
  1530 	 * Turn off maintenance mode after upgrading the current theme.
       
  1531 	 *
       
  1532 	 * Hooked to the {@see 'upgrader_post_install'} filter by {@see Theme_Upgrader::upgrade()}
       
  1533 	 * and {@see Theme_Upgrader::bulk_upgrade()}.
       
  1534 	 *
       
  1535 	 * @since 2.8.0
       
  1536 	 */
       
  1537 	public function current_after($return, $theme) {
       
  1538 		if ( is_wp_error($return) )
       
  1539 			return $return;
       
  1540 
       
  1541 		$theme = isset($theme['theme']) ? $theme['theme'] : '';
       
  1542 
       
  1543 		if ( $theme != get_stylesheet() ) // If not current
       
  1544 			return $return;
       
  1545 
       
  1546 		// Ensure stylesheet name hasn't changed after the upgrade:
       
  1547 		if ( $theme == get_stylesheet() && $theme != $this->result['destination_name'] ) {
       
  1548 			wp_clean_themes_cache();
       
  1549 			$stylesheet = $this->result['destination_name'];
       
  1550 			switch_theme( $stylesheet );
       
  1551 		}
       
  1552 
       
  1553 		//Time to remove maintenance mode
       
  1554 		if ( ! $this->bulk )
       
  1555 			$this->maintenance_mode(false);
       
  1556 		return $return;
       
  1557 	}
       
  1558 
       
  1559 	/**
       
  1560 	 * Delete the old theme during an upgrade.
       
  1561 	 *
       
  1562 	 * Hooked to the {@see 'upgrader_clear_destination'} filter by {@see Theme_Upgrader::upgrade()}
       
  1563 	 * and {@see Theme_Upgrader::bulk_upgrade()}.
       
  1564 	 *
       
  1565 	 * @since 2.8.0
       
  1566 	 */
       
  1567 	public function delete_old_theme( $removed, $local_destination, $remote_destination, $theme ) {
       
  1568 		global $wp_filesystem;
       
  1569 
       
  1570 		if ( is_wp_error( $removed ) )
       
  1571 			return $removed; // Pass errors through.
       
  1572 
       
  1573 		if ( ! isset( $theme['theme'] ) )
       
  1574 			return $removed;
       
  1575 
       
  1576 		$theme = $theme['theme'];
       
  1577 		$themes_dir = trailingslashit( $wp_filesystem->wp_themes_dir( $theme ) );
       
  1578 		if ( $wp_filesystem->exists( $themes_dir . $theme ) ) {
       
  1579 			if ( ! $wp_filesystem->delete( $themes_dir . $theme, true ) )
       
  1580 				return false;
       
  1581 		}
       
  1582 
       
  1583 		return true;
       
  1584 	}
       
  1585 
       
  1586 	/**
       
  1587 	 * Get the WP_Theme object for a theme.
       
  1588 	 *
       
  1589 	 * @since 2.8.0
       
  1590 	 * @since 3.0.0 The `$theme` argument was added.
       
  1591 	 *
       
  1592 	 * @param string $theme The directory name of the theme. This is optional, and if not supplied,
       
  1593 	 *                      the directory name from the last result will be used.
       
  1594 	 * @return WP_Theme|false The theme's info object, or false `$theme` is not supplied
       
  1595 	 *                        and the last result isn't set.
       
  1596 	 */
       
  1597 	public function theme_info($theme = null) {
       
  1598 
       
  1599 		if ( empty($theme) ) {
       
  1600 			if ( !empty($this->result['destination_name']) )
       
  1601 				$theme = $this->result['destination_name'];
       
  1602 			else
       
  1603 				return false;
       
  1604 		}
       
  1605 		return wp_get_theme( $theme );
       
  1606 	}
       
  1607 
       
  1608 }
       
  1609 
       
  1610 add_action( 'upgrader_process_complete', array( 'Language_Pack_Upgrader', 'async_upgrade' ), 20 );
       
  1611 
       
  1612 /**
       
  1613  * Language pack upgrader, for updating translations of plugins, themes, and core.
       
  1614  *
       
  1615  * @package WordPress
       
  1616  * @subpackage Upgrader
       
  1617  * @since 3.7.0
       
  1618  */
       
  1619 class Language_Pack_Upgrader extends WP_Upgrader {
       
  1620 
       
  1621 	/**
       
  1622 	 * Result of the language pack upgrade.
       
  1623 	 *
       
  1624 	 * @since 3.7.0
       
  1625 	 * @var array|WP_Error $result
       
  1626 	 * @see WP_Upgrader::$result
       
  1627 	 */
       
  1628 	public $result;
       
  1629 
       
  1630 	/**
       
  1631 	 * Whether a bulk upgrade/install is being performed.
       
  1632 	 *
       
  1633 	 * @since 3.7.0
       
  1634 	 * @var bool $bulk
       
  1635 	 */
       
  1636 	public $bulk = true;
       
  1637 
       
  1638 	/**
       
  1639 	 * Asynchronously upgrade language packs after other upgrades have been made.
       
  1640 	 *
       
  1641 	 * Hooked to the {@see 'upgrader_process_complete'} action by default.
       
  1642 	 *
       
  1643 	 * @since 3.7.0
       
  1644 	 */
       
  1645 	public static function async_upgrade( $upgrader = false ) {
       
  1646 		// Avoid recursion.
       
  1647 		if ( $upgrader && $upgrader instanceof Language_Pack_Upgrader ) {
       
  1648 			return;
       
  1649 		}
       
  1650 
       
  1651 		// Nothing to do?
       
  1652 		$language_updates = wp_get_translation_updates();
       
  1653 		if ( ! $language_updates ) {
       
  1654 			return;
       
  1655 		}
       
  1656 
       
  1657 		// Avoid messing with VCS installs, at least for now.
       
  1658 		// Noted: this is not the ideal way to accomplish this.
       
  1659 		$check_vcs = new WP_Automatic_Updater;
       
  1660 		if ( $check_vcs->is_vcs_checkout( WP_CONTENT_DIR ) ) {
       
  1661 			return;
       
  1662 		}
       
  1663 
       
  1664 		foreach ( $language_updates as $key => $language_update ) {
       
  1665 			$update = ! empty( $language_update->autoupdate );
       
  1666 
       
  1667 			/**
       
  1668 			 * Filter whether to asynchronously update translation for core, a plugin, or a theme.
       
  1669 			 *
       
  1670 			 * @since 4.0.0
       
  1671 			 *
       
  1672 			 * @param bool   $update          Whether to update.
       
  1673 			 * @param object $language_update The update offer.
       
  1674 			 */
       
  1675 			$update = apply_filters( 'async_update_translation', $update, $language_update );
       
  1676 
       
  1677 			if ( ! $update ) {
       
  1678 				unset( $language_updates[ $key ] );
       
  1679 			}
       
  1680 		}
       
  1681 
       
  1682 		if ( empty( $language_updates ) ) {
       
  1683 			return;
       
  1684 		}
       
  1685 
       
  1686 		$skin = new Language_Pack_Upgrader_Skin( array(
       
  1687 			'skip_header_footer' => true,
       
  1688 		) );
       
  1689 
       
  1690 		$lp_upgrader = new Language_Pack_Upgrader( $skin );
       
  1691 		$lp_upgrader->bulk_upgrade( $language_updates );
       
  1692 	}
       
  1693 
       
  1694 	/**
       
  1695 	 * Initialize the upgrade strings.
       
  1696 	 *
       
  1697 	 * @since 3.7.0
       
  1698 	 */
       
  1699 	public function upgrade_strings() {
       
  1700 		$this->strings['starting_upgrade'] = __( 'Some of your translations need updating. Sit tight for a few more seconds while we update them as well.' );
       
  1701 		$this->strings['up_to_date'] = __( 'The translation is up to date.' ); // We need to silently skip this case
       
  1702 		$this->strings['no_package'] = __( 'Update package not available.' );
       
  1703 		$this->strings['downloading_package'] = __( 'Downloading translation from <span class="code">%s</span>&#8230;' );
       
  1704 		$this->strings['unpack_package'] = __( 'Unpacking the update&#8230;' );
       
  1705 		$this->strings['process_failed'] = __( 'Translation update failed.' );
       
  1706 		$this->strings['process_success'] = __( 'Translation updated successfully.' );
       
  1707 	}
       
  1708 
       
  1709 	/**
       
  1710 	 * Upgrade a language pack.
       
  1711 	 *
       
  1712 	 * @since 3.7.0
       
  1713 	 *
       
  1714 	 * @param string|false $update Optional. Whether an update offer is available. Default false.
       
  1715 	 * @param array        $args   Optional. Other optional arguments, see
       
  1716 	 *                             {@see Language_Pack_Upgrader::bulk_upgrade()}. Default empty array.
       
  1717 	 * @return array|WP_Error The result of the upgrade, or a {@see wP_Error} object instead.
       
  1718 	 */
       
  1719 	public function upgrade( $update = false, $args = array() ) {
       
  1720 		if ( $update ) {
       
  1721 			$update = array( $update );
       
  1722 		}
       
  1723 
       
  1724 		$results = $this->bulk_upgrade( $update, $args );
       
  1725 
       
  1726 		if ( ! is_array( $results ) ) {
       
  1727 			return $results;
       
  1728 		}
       
  1729 
       
  1730 		return $results[0];
       
  1731 	}
       
  1732 
       
  1733 	/**
       
  1734 	 * Bulk upgrade language packs.
       
  1735 	 *
       
  1736 	 * @since 3.7.0
       
  1737 	 *
       
  1738 	 * @param array $language_updates Optional. Language pack updates. Default empty array.
       
  1739 	 * @param array $args {
       
  1740 	 *     Optional. Other arguments for upgrading multiple language packs. Default empty array
       
  1741 	 *
       
  1742 	 *     @type bool $clear_update_cache Whether to clear the update cache when done.
       
  1743 	 *                                    Default true.
       
  1744 	 * }
       
  1745 	 * @return array|true|false|WP_Error Will return an array of results, or true if there are no updates,
       
  1746 	 *                                   false or WP_Error for initial errors.
       
  1747 	 */
       
  1748 	public function bulk_upgrade( $language_updates = array(), $args = array() ) {
       
  1749 		global $wp_filesystem;
       
  1750 
       
  1751 		$defaults = array(
       
  1752 			'clear_update_cache' => true,
       
  1753 		);
       
  1754 		$parsed_args = wp_parse_args( $args, $defaults );
       
  1755 
       
  1756 		$this->init();
       
  1757 		$this->upgrade_strings();
       
  1758 
       
  1759 		if ( ! $language_updates )
       
  1760 			$language_updates = wp_get_translation_updates();
       
  1761 
       
  1762 		if ( empty( $language_updates ) ) {
       
  1763 			$this->skin->header();
       
  1764 			$this->skin->before();
       
  1765 			$this->skin->set_result( true );
       
  1766 			$this->skin->feedback( 'up_to_date' );
       
  1767 			$this->skin->after();
       
  1768 			$this->skin->bulk_footer();
       
  1769 			$this->skin->footer();
       
  1770 			return true;
       
  1771 		}
       
  1772 
       
  1773 		if ( 'upgrader_process_complete' == current_filter() )
       
  1774 			$this->skin->feedback( 'starting_upgrade' );
       
  1775 
       
  1776 		// Remove any existing upgrade filters from the plugin/theme upgraders #WP29425 & #WP29230
       
  1777 		remove_all_filters( 'upgrader_pre_install' );
       
  1778 		remove_all_filters( 'upgrader_clear_destination' );
       
  1779 		remove_all_filterS( 'upgrader_post_install' );
       
  1780 		remove_all_filters( 'upgrader_source_selection' );
       
  1781 
       
  1782 		add_filter( 'upgrader_source_selection', array( $this, 'check_package' ), 10, 2 );
       
  1783 
       
  1784 		$this->skin->header();
       
  1785 
       
  1786 		// Connect to the Filesystem first.
       
  1787 		$res = $this->fs_connect( array( WP_CONTENT_DIR, WP_LANG_DIR ) );
       
  1788 		if ( ! $res ) {
       
  1789 			$this->skin->footer();
       
  1790 			return false;
       
  1791 		}
       
  1792 
       
  1793 		$results = array();
       
  1794 
       
  1795 		$this->update_count = count( $language_updates );
       
  1796 		$this->update_current = 0;
       
  1797 
       
  1798 		/*
       
  1799 		 * The filesystem's mkdir() is not recursive. Make sure WP_LANG_DIR exists,
       
  1800 		 * as we then may need to create a /plugins or /themes directory inside of it.
       
  1801 		 */
       
  1802 		$remote_destination = $wp_filesystem->find_folder( WP_LANG_DIR );
       
  1803 		if ( ! $wp_filesystem->exists( $remote_destination ) )
       
  1804 			if ( ! $wp_filesystem->mkdir( $remote_destination, FS_CHMOD_DIR ) )
       
  1805 				return new WP_Error( 'mkdir_failed_lang_dir', $this->strings['mkdir_failed'], $remote_destination );
       
  1806 
       
  1807 		foreach ( $language_updates as $language_update ) {
       
  1808 
       
  1809 			$this->skin->language_update = $language_update;
       
  1810 
       
  1811 			$destination = WP_LANG_DIR;
       
  1812 			if ( 'plugin' == $language_update->type )
       
  1813 				$destination .= '/plugins';
       
  1814 			elseif ( 'theme' == $language_update->type )
       
  1815 				$destination .= '/themes';
       
  1816 
       
  1817 			$this->update_current++;
       
  1818 
       
  1819 			$options = array(
       
  1820 				'package' => $language_update->package,
       
  1821 				'destination' => $destination,
       
  1822 				'clear_destination' => false,
       
  1823 				'abort_if_destination_exists' => false, // We expect the destination to exist.
       
  1824 				'clear_working' => true,
       
  1825 				'is_multi' => true,
       
  1826 				'hook_extra' => array(
       
  1827 					'language_update_type' => $language_update->type,
       
  1828 					'language_update' => $language_update,
       
  1829 				)
       
  1830 			);
       
  1831 
       
  1832 			$result = $this->run( $options );
       
  1833 
       
  1834 			$results[] = $this->result;
       
  1835 
       
  1836 			// Prevent credentials auth screen from displaying multiple times.
       
  1837 			if ( false === $result )
       
  1838 				break;
       
  1839 		}
       
  1840 
       
  1841 		$this->skin->bulk_footer();
       
  1842 
       
  1843 		$this->skin->footer();
       
  1844 
       
  1845 		// Clean up our hooks, in case something else does an upgrade on this connection.
       
  1846 		remove_filter( 'upgrader_source_selection', array( $this, 'check_package' ) );
       
  1847 
       
  1848 		if ( $parsed_args['clear_update_cache'] ) {
       
  1849 			wp_clean_update_cache();
       
  1850 		}
       
  1851 
       
  1852 		return $results;
       
  1853 	}
       
  1854 
       
  1855 	/**
       
  1856 	 * Check the package source to make sure there are .mo and .po files.
       
  1857 	 *
       
  1858 	 * Hooked to the {@see 'upgrader_source_selection'} filter by
       
  1859 	 * {@see Language_Pack_Upgrader::bulk_upgrade()}.
       
  1860 	 *
       
  1861 	 * @since 3.7.0
       
  1862 	 */
       
  1863 	public function check_package( $source, $remote_source ) {
       
  1864 		global $wp_filesystem;
       
  1865 
       
  1866 		if ( is_wp_error( $source ) )
       
  1867 			return $source;
       
  1868 
       
  1869 		// Check that the folder contains a valid language.
       
  1870 		$files = $wp_filesystem->dirlist( $remote_source );
       
  1871 
       
  1872 		// Check to see if a .po and .mo exist in the folder.
       
  1873 		$po = $mo = false;
       
  1874 		foreach ( (array) $files as $file => $filedata ) {
       
  1875 			if ( '.po' == substr( $file, -3 ) )
       
  1876 				$po = true;
       
  1877 			elseif ( '.mo' == substr( $file, -3 ) )
       
  1878 				$mo = true;
       
  1879 		}
       
  1880 
       
  1881 		if ( ! $mo || ! $po )
       
  1882 			return new WP_Error( 'incompatible_archive_pomo', $this->strings['incompatible_archive'],
       
  1883 				__( 'The language pack is missing either the <code>.po</code> or <code>.mo</code> files.' ) );
       
  1884 
       
  1885 		return $source;
       
  1886 	}
       
  1887 
       
  1888 	/**
       
  1889 	 * Get the name of an item being updated.
       
  1890 	 *
       
  1891 	 * @since 3.7.0
       
  1892 	 *
       
  1893 	 * @param object The data for an update.
       
  1894 	 * @return string The name of the item being updated.
       
  1895 	 */
       
  1896 	public function get_name_for_update( $update ) {
       
  1897 		switch ( $update->type ) {
       
  1898 			case 'core':
       
  1899 				return 'WordPress'; // Not translated
       
  1900 
       
  1901 			case 'theme':
       
  1902 				$theme = wp_get_theme( $update->slug );
       
  1903 				if ( $theme->exists() )
       
  1904 					return $theme->Get( 'Name' );
       
  1905 				break;
       
  1906 			case 'plugin':
       
  1907 				$plugin_data = get_plugins( '/' . $update->slug );
       
  1908 				$plugin_data = reset( $plugin_data );
       
  1909 				if ( $plugin_data )
       
  1910 					return $plugin_data['Name'];
       
  1911 				break;
       
  1912 		}
       
  1913 		return '';
       
  1914 	}
       
  1915 
       
  1916 }
       
  1917 
       
  1918 /**
       
  1919  * Core Upgrader class for WordPress. It allows for WordPress to upgrade itself in combination with the wp-admin/includes/update-core.php file
       
  1920  *
       
  1921  * @package WordPress
       
  1922  * @subpackage Upgrader
       
  1923  * @since 2.8.0
       
  1924  */
       
  1925 class Core_Upgrader extends WP_Upgrader {
       
  1926 
       
  1927 	/**
       
  1928 	 * Initialize the upgrade strings.
       
  1929 	 *
       
  1930 	 * @since 2.8.0
       
  1931 	 */
       
  1932 	public function upgrade_strings() {
       
  1933 		$this->strings['up_to_date'] = __('WordPress is at the latest version.');
       
  1934 		$this->strings['no_package'] = __('Update package not available.');
       
  1935 		$this->strings['downloading_package'] = __('Downloading update from <span class="code">%s</span>&#8230;');
       
  1936 		$this->strings['unpack_package'] = __('Unpacking the update&#8230;');
       
  1937 		$this->strings['copy_failed'] = __('Could not copy files.');
       
  1938 		$this->strings['copy_failed_space'] = __('Could not copy files. You may have run out of disk space.' );
       
  1939 		$this->strings['start_rollback'] = __( 'Attempting to roll back to previous version.' );
       
  1940 		$this->strings['rollback_was_required'] = __( 'Due to an error during updating, WordPress has rolled back to your previous version.' );
       
  1941 	}
       
  1942 
       
  1943 	/**
       
  1944 	 * Upgrade WordPress core.
       
  1945 	 *
       
  1946 	 * @since 2.8.0
       
  1947 	 *
       
  1948 	 * @param object $current Response object for whether WordPress is current.
       
  1949 	 * @param array  $args {
       
  1950 	 *        Optional. Arguments for upgrading WordPress core. Default empty array.
       
  1951 	 *
       
  1952 	 *        @type bool $pre_check_md5    Whether to check the file checksums before
       
  1953 	 *                                     attempting the upgrade. Default true.
       
  1954 	 *        @type bool $attempt_rollback Whether to attempt to rollback the chances if
       
  1955 	 *                                     there is a problem. Default false.
       
  1956 	 *        @type bool $do_rollback      Whether to perform this "upgrade" as a rollback.
       
  1957 	 *                                     Default false.
       
  1958 	 * }
       
  1959 	 * @return null|false|WP_Error False or WP_Error on failure, null on success.
       
  1960 	 */
       
  1961 	public function upgrade( $current, $args = array() ) {
       
  1962 		global $wp_filesystem;
       
  1963 
       
  1964 		include( ABSPATH . WPINC . '/version.php' ); // $wp_version;
       
  1965 
       
  1966 		$start_time = time();
       
  1967 
       
  1968 		$defaults = array(
       
  1969 			'pre_check_md5'    => true,
       
  1970 			'attempt_rollback' => false,
       
  1971 			'do_rollback'      => false,
       
  1972 			'allow_relaxed_file_ownership' => false,
       
  1973 		);
       
  1974 		$parsed_args = wp_parse_args( $args, $defaults );
       
  1975 
       
  1976 		$this->init();
       
  1977 		$this->upgrade_strings();
       
  1978 
       
  1979 		// Is an update available?
       
  1980 		if ( !isset( $current->response ) || $current->response == 'latest' )
       
  1981 			return new WP_Error('up_to_date', $this->strings['up_to_date']);
       
  1982 
       
  1983 		$res = $this->fs_connect( array( ABSPATH, WP_CONTENT_DIR ), $parsed_args['allow_relaxed_file_ownership'] );
       
  1984 		if ( ! $res || is_wp_error( $res ) ) {
       
  1985 			return $res;
       
  1986 		}
       
  1987 
       
  1988 		$wp_dir = trailingslashit($wp_filesystem->abspath());
       
  1989 
       
  1990 		$partial = true;
       
  1991 		if ( $parsed_args['do_rollback'] )
       
  1992 			$partial = false;
       
  1993 		elseif ( $parsed_args['pre_check_md5'] && ! $this->check_files() )
       
  1994 			$partial = false;
       
  1995 
       
  1996 		/*
       
  1997 		 * If partial update is returned from the API, use that, unless we're doing
       
  1998 		 * a reinstall. If we cross the new_bundled version number, then use
       
  1999 		 * the new_bundled zip. Don't though if the constant is set to skip bundled items.
       
  2000 		 * If the API returns a no_content zip, go with it. Finally, default to the full zip.
       
  2001 		 */
       
  2002 		if ( $parsed_args['do_rollback'] && $current->packages->rollback )
       
  2003 			$to_download = 'rollback';
       
  2004 		elseif ( $current->packages->partial && 'reinstall' != $current->response && $wp_version == $current->partial_version && $partial )
       
  2005 			$to_download = 'partial';
       
  2006 		elseif ( $current->packages->new_bundled && version_compare( $wp_version, $current->new_bundled, '<' )
       
  2007 			&& ( ! defined( 'CORE_UPGRADE_SKIP_NEW_BUNDLED' ) || ! CORE_UPGRADE_SKIP_NEW_BUNDLED ) )
       
  2008 			$to_download = 'new_bundled';
       
  2009 		elseif ( $current->packages->no_content )
       
  2010 			$to_download = 'no_content';
       
  2011 		else
       
  2012 			$to_download = 'full';
       
  2013 
       
  2014 		$download = $this->download_package( $current->packages->$to_download );
       
  2015 		if ( is_wp_error($download) )
       
  2016 			return $download;
       
  2017 
       
  2018 		$working_dir = $this->unpack_package( $download );
       
  2019 		if ( is_wp_error($working_dir) )
       
  2020 			return $working_dir;
       
  2021 
       
  2022 		// Copy update-core.php from the new version into place.
       
  2023 		if ( !$wp_filesystem->copy($working_dir . '/wordpress/wp-admin/includes/update-core.php', $wp_dir . 'wp-admin/includes/update-core.php', true) ) {
       
  2024 			$wp_filesystem->delete($working_dir, true);
       
  2025 			return new WP_Error( 'copy_failed_for_update_core_file', __( 'The update cannot be installed because we will be unable to copy some files. This is usually due to inconsistent file permissions.' ), 'wp-admin/includes/update-core.php' );
       
  2026 		}
       
  2027 		$wp_filesystem->chmod($wp_dir . 'wp-admin/includes/update-core.php', FS_CHMOD_FILE);
       
  2028 
       
  2029 		require_once( ABSPATH . 'wp-admin/includes/update-core.php' );
       
  2030 
       
  2031 		if ( ! function_exists( 'update_core' ) )
       
  2032 			return new WP_Error( 'copy_failed_space', $this->strings['copy_failed_space'] );
       
  2033 
       
  2034 		$result = update_core( $working_dir, $wp_dir );
       
  2035 
       
  2036 		// In the event of an issue, we may be able to roll back.
       
  2037 		if ( $parsed_args['attempt_rollback'] && $current->packages->rollback && ! $parsed_args['do_rollback'] ) {
       
  2038 			$try_rollback = false;
       
  2039 			if ( is_wp_error( $result ) ) {
       
  2040 				$error_code = $result->get_error_code();
       
  2041 				/*
       
  2042 				 * Not all errors are equal. These codes are critical: copy_failed__copy_dir,
       
  2043 				 * mkdir_failed__copy_dir, copy_failed__copy_dir_retry, and disk_full.
       
  2044 				 * do_rollback allows for update_core() to trigger a rollback if needed.
       
  2045 				 */
       
  2046 				if ( false !== strpos( $error_code, 'do_rollback' ) )
       
  2047 					$try_rollback = true;
       
  2048 				elseif ( false !== strpos( $error_code, '__copy_dir' ) )
       
  2049 					$try_rollback = true;
       
  2050 				elseif ( 'disk_full' === $error_code )
       
  2051 					$try_rollback = true;
       
  2052 			}
       
  2053 
       
  2054 			if ( $try_rollback ) {
       
  2055 				/** This filter is documented in wp-admin/includes/update-core.php */
       
  2056 				apply_filters( 'update_feedback', $result );
       
  2057 
       
  2058 				/** This filter is documented in wp-admin/includes/update-core.php */
       
  2059 				apply_filters( 'update_feedback', $this->strings['start_rollback'] );
       
  2060 
       
  2061 				$rollback_result = $this->upgrade( $current, array_merge( $parsed_args, array( 'do_rollback' => true ) ) );
       
  2062 
       
  2063 				$original_result = $result;
       
  2064 				$result = new WP_Error( 'rollback_was_required', $this->strings['rollback_was_required'], (object) array( 'update' => $original_result, 'rollback' => $rollback_result ) );
       
  2065 			}
       
  2066 		}
       
  2067 
       
  2068 		/** This action is documented in wp-admin/includes/class-wp-upgrader.php */
       
  2069 		do_action( 'upgrader_process_complete', $this, array( 'action' => 'update', 'type' => 'core' ) );
       
  2070 
       
  2071 		// Clear the current updates
       
  2072 		delete_site_transient( 'update_core' );
       
  2073 
       
  2074 		if ( ! $parsed_args['do_rollback'] ) {
       
  2075 			$stats = array(
       
  2076 				'update_type'      => $current->response,
       
  2077 				'success'          => true,
       
  2078 				'fs_method'        => $wp_filesystem->method,
       
  2079 				'fs_method_forced' => defined( 'FS_METHOD' ) || has_filter( 'filesystem_method' ),
       
  2080 				'fs_method_direct' => !empty( $GLOBALS['_wp_filesystem_direct_method'] ) ? $GLOBALS['_wp_filesystem_direct_method'] : '',
       
  2081 				'time_taken'       => time() - $start_time,
       
  2082 				'reported'         => $wp_version,
       
  2083 				'attempted'        => $current->version,
       
  2084 			);
       
  2085 
       
  2086 			if ( is_wp_error( $result ) ) {
       
  2087 				$stats['success'] = false;
       
  2088 				// Did a rollback occur?
       
  2089 				if ( ! empty( $try_rollback ) ) {
       
  2090 					$stats['error_code'] = $original_result->get_error_code();
       
  2091 					$stats['error_data'] = $original_result->get_error_data();
       
  2092 					// Was the rollback successful? If not, collect its error too.
       
  2093 					$stats['rollback'] = ! is_wp_error( $rollback_result );
       
  2094 					if ( is_wp_error( $rollback_result ) ) {
       
  2095 						$stats['rollback_code'] = $rollback_result->get_error_code();
       
  2096 						$stats['rollback_data'] = $rollback_result->get_error_data();
       
  2097 					}
       
  2098 				} else {
       
  2099 					$stats['error_code'] = $result->get_error_code();
       
  2100 					$stats['error_data'] = $result->get_error_data();
       
  2101 				}
       
  2102 			}
       
  2103 
       
  2104 			wp_version_check( $stats );
       
  2105 		}
       
  2106 
       
  2107 		return $result;
       
  2108 	}
       
  2109 
       
  2110 	/**
       
  2111 	 * Determines if this WordPress Core version should update to an offered version or not.
       
  2112 	 *
       
  2113 	 * @since 3.7.0
       
  2114 	 *
       
  2115 	 * @param string $offered_ver The offered version, of the format x.y.z.
       
  2116 	 * @return bool True if we should update to the offered version, otherwise false.
       
  2117 	 */
       
  2118 	public static function should_update_to_version( $offered_ver ) {
       
  2119 		include( ABSPATH . WPINC . '/version.php' ); // $wp_version; // x.y.z
       
  2120 
       
  2121 		$current_branch = implode( '.', array_slice( preg_split( '/[.-]/', $wp_version  ), 0, 2 ) ); // x.y
       
  2122 		$new_branch     = implode( '.', array_slice( preg_split( '/[.-]/', $offered_ver ), 0, 2 ) ); // x.y
       
  2123 		$current_is_development_version = (bool) strpos( $wp_version, '-' );
       
  2124 
       
  2125 		// Defaults:
       
  2126 		$upgrade_dev   = true;
       
  2127 		$upgrade_minor = true;
       
  2128 		$upgrade_major = false;
       
  2129 
       
  2130 		// WP_AUTO_UPDATE_CORE = true (all), 'minor', false.
       
  2131 		if ( defined( 'WP_AUTO_UPDATE_CORE' ) ) {
       
  2132 			if ( false === WP_AUTO_UPDATE_CORE ) {
       
  2133 				// Defaults to turned off, unless a filter allows it
       
  2134 				$upgrade_dev = $upgrade_minor = $upgrade_major = false;
       
  2135 			} elseif ( true === WP_AUTO_UPDATE_CORE ) {
       
  2136 				// ALL updates for core
       
  2137 				$upgrade_dev = $upgrade_minor = $upgrade_major = true;
       
  2138 			} elseif ( 'minor' === WP_AUTO_UPDATE_CORE ) {
       
  2139 				// Only minor updates for core
       
  2140 				$upgrade_dev = $upgrade_major = false;
       
  2141 				$upgrade_minor = true;
       
  2142 			}
       
  2143 		}
       
  2144 
       
  2145 		// 1: If we're already on that version, not much point in updating?
       
  2146 		if ( $offered_ver == $wp_version )
       
  2147 			return false;
       
  2148 
       
  2149 		// 2: If we're running a newer version, that's a nope
       
  2150 		if ( version_compare( $wp_version, $offered_ver, '>' ) )
       
  2151 			return false;
       
  2152 
       
  2153 		$failure_data = get_site_option( 'auto_core_update_failed' );
       
  2154 		if ( $failure_data ) {
       
  2155 			// If this was a critical update failure, cannot update.
       
  2156 			if ( ! empty( $failure_data['critical'] ) )
       
  2157 				return false;
       
  2158 
       
  2159 			// Don't claim we can update on update-core.php if we have a non-critical failure logged.
       
  2160 			if ( $wp_version == $failure_data['current'] && false !== strpos( $offered_ver, '.1.next.minor' ) )
       
  2161 				return false;
       
  2162 
       
  2163 			// Cannot update if we're retrying the same A to B update that caused a non-critical failure.
       
  2164 			// Some non-critical failures do allow retries, like download_failed.
       
  2165 			// 3.7.1 => 3.7.2 resulted in files_not_writable, if we are still on 3.7.1 and still trying to update to 3.7.2.
       
  2166 			if ( empty( $failure_data['retry'] ) && $wp_version == $failure_data['current'] && $offered_ver == $failure_data['attempted'] )
       
  2167 				return false;
       
  2168 		}
       
  2169 
       
  2170 		// 3: 3.7-alpha-25000 -> 3.7-alpha-25678 -> 3.7-beta1 -> 3.7-beta2
       
  2171 		if ( $current_is_development_version ) {
       
  2172 
       
  2173 			/**
       
  2174 			 * Filter whether to enable automatic core updates for development versions.
       
  2175 			 *
       
  2176 			 * @since 3.7.0
       
  2177 			 *
       
  2178 			 * @param bool $upgrade_dev Whether to enable automatic updates for
       
  2179 			 *                          development versions.
       
  2180 			 */
       
  2181 			if ( ! apply_filters( 'allow_dev_auto_core_updates', $upgrade_dev ) )
       
  2182 				return false;
       
  2183 			// Else fall through to minor + major branches below.
       
  2184 		}
       
  2185 
       
  2186 		// 4: Minor In-branch updates (3.7.0 -> 3.7.1 -> 3.7.2 -> 3.7.4)
       
  2187 		if ( $current_branch == $new_branch ) {
       
  2188 
       
  2189 			/**
       
  2190 			 * Filter whether to enable minor automatic core updates.
       
  2191 			 *
       
  2192 			 * @since 3.7.0
       
  2193 			 *
       
  2194 			 * @param bool $upgrade_minor Whether to enable minor automatic core updates.
       
  2195 			 */
       
  2196 			return apply_filters( 'allow_minor_auto_core_updates', $upgrade_minor );
       
  2197 		}
       
  2198 
       
  2199 		// 5: Major version updates (3.7.0 -> 3.8.0 -> 3.9.1)
       
  2200 		if ( version_compare( $new_branch, $current_branch, '>' ) ) {
       
  2201 
       
  2202 			/**
       
  2203 			 * Filter whether to enable major automatic core updates.
       
  2204 			 *
       
  2205 			 * @since 3.7.0
       
  2206 			 *
       
  2207 			 * @param bool $upgrade_major Whether to enable major automatic core updates.
       
  2208 			 */
       
  2209 			return apply_filters( 'allow_major_auto_core_updates', $upgrade_major );
       
  2210 		}
       
  2211 
       
  2212 		// If we're not sure, we don't want it
       
  2213 		return false;
       
  2214 	}
       
  2215 
       
  2216 	/**
       
  2217 	 * Compare the disk file checksums agains the expected checksums.
       
  2218 	 *
       
  2219 	 * @since 3.7.0
       
  2220 	 *
       
  2221 	 * @return bool True if the checksums match, otherwise false.
       
  2222 	 */
       
  2223 	public function check_files() {
       
  2224 		global $wp_version, $wp_local_package;
       
  2225 
       
  2226 		$checksums = get_core_checksums( $wp_version, isset( $wp_local_package ) ? $wp_local_package : 'en_US' );
       
  2227 
       
  2228 		if ( ! is_array( $checksums ) )
       
  2229 			return false;
       
  2230 
       
  2231 		foreach ( $checksums as $file => $checksum ) {
       
  2232 			// Skip files which get updated
       
  2233 			if ( 'wp-content' == substr( $file, 0, 10 ) )
       
  2234 				continue;
       
  2235 			if ( ! file_exists( ABSPATH . $file ) || md5_file( ABSPATH . $file ) !== $checksum )
       
  2236 				return false;
       
  2237 		}
       
  2238 
       
  2239 		return true;
       
  2240 	}
       
  2241 }
       
  2242 
       
  2243 /**
       
  2244  * Upgrade Skin helper for File uploads. This class handles the upload process and passes it as if it's a local file to the Upgrade/Installer functions.
       
  2245  *
       
  2246  * @package WordPress
       
  2247  * @subpackage Upgrader
       
  2248  * @since 2.8.0
       
  2249  */
       
  2250 class File_Upload_Upgrader {
       
  2251 
       
  2252 	/**
       
  2253 	 * The full path to the file package.
       
  2254 	 *
       
  2255 	 * @since 2.8.0
       
  2256 	 * @var string $package
       
  2257 	 */
       
  2258 	public $package;
       
  2259 
       
  2260 	/**
       
  2261 	 * The name of the file.
       
  2262 	 *
       
  2263 	 * @since 2.8.0
       
  2264 	 * @var string $filename
       
  2265 	 */
       
  2266 	public $filename;
       
  2267 
       
  2268 	/**
       
  2269 	 * The ID of the attachment post for this file.
       
  2270 	 *
       
  2271 	 * @since 3.3.0
       
  2272 	 * @var int $id
       
  2273 	 */
       
  2274 	public $id = 0;
       
  2275 
       
  2276 	/**
       
  2277 	 * Construct the upgrader for a form.
       
  2278 	 *
       
  2279 	 * @since 2.8.0
       
  2280 	 *
       
  2281 	 * @param string $form      The name of the form the file was uploaded from.
       
  2282 	 * @param string $urlholder The name of the `GET` parameter that holds the filename.
       
  2283 	 */
       
  2284 	public function __construct( $form, $urlholder ) {
       
  2285 
       
  2286 		if ( empty($_FILES[$form]['name']) && empty($_GET[$urlholder]) )
       
  2287 			wp_die(__('Please select a file'));
       
  2288 
       
  2289 		//Handle a newly uploaded file, Else assume it's already been uploaded
       
  2290 		if ( ! empty($_FILES) ) {
       
  2291 			$overrides = array( 'test_form' => false, 'test_type' => false );
       
  2292 			$file = wp_handle_upload( $_FILES[$form], $overrides );
       
  2293 
       
  2294 			if ( isset( $file['error'] ) )
       
  2295 				wp_die( $file['error'] );
       
  2296 
       
  2297 			$this->filename = $_FILES[$form]['name'];
       
  2298 			$this->package = $file['file'];
       
  2299 
       
  2300 			// Construct the object array
       
  2301 			$object = array(
       
  2302 				'post_title' => $this->filename,
       
  2303 				'post_content' => $file['url'],
       
  2304 				'post_mime_type' => $file['type'],
       
  2305 				'guid' => $file['url'],
       
  2306 				'context' => 'upgrader',
       
  2307 				'post_status' => 'private'
       
  2308 			);
       
  2309 
       
  2310 			// Save the data.
       
  2311 			$this->id = wp_insert_attachment( $object, $file['file'] );
       
  2312 
       
  2313 			// Schedule a cleanup for 2 hours from now in case of failed install.
       
  2314 			wp_schedule_single_event( time() + 2 * HOUR_IN_SECONDS, 'upgrader_scheduled_cleanup', array( $this->id ) );
       
  2315 
       
  2316 		} elseif ( is_numeric( $_GET[$urlholder] ) ) {
       
  2317 			// Numeric Package = previously uploaded file, see above.
       
  2318 			$this->id = (int) $_GET[$urlholder];
       
  2319 			$attachment = get_post( $this->id );
       
  2320 			if ( empty($attachment) )
       
  2321 				wp_die(__('Please select a file'));
       
  2322 
       
  2323 			$this->filename = $attachment->post_title;
       
  2324 			$this->package = get_attached_file( $attachment->ID );
       
  2325 		} else {
       
  2326 			// Else, It's set to something, Back compat for plugins using the old (pre-3.3) File_Uploader handler.
       
  2327 			if ( ! ( ( $uploads = wp_upload_dir() ) && false === $uploads['error'] ) )
       
  2328 				wp_die( $uploads['error'] );
       
  2329 
       
  2330 			$this->filename = $_GET[$urlholder];
       
  2331 			$this->package = $uploads['basedir'] . '/' . $this->filename;
       
  2332 		}
       
  2333 	}
       
  2334 
       
  2335 	/**
       
  2336 	 * Delete the attachment/uploaded file.
       
  2337 	 *
       
  2338 	 * @since 3.2.2
       
  2339 	 *
       
  2340 	 * @return bool Whether the cleanup was successful.
       
  2341 	 */
       
  2342 	public function cleanup() {
       
  2343 		if ( $this->id )
       
  2344 			wp_delete_attachment( $this->id );
       
  2345 
       
  2346 		elseif ( file_exists( $this->package ) )
       
  2347 			return @unlink( $this->package );
       
  2348 
       
  2349 		return true;
       
  2350 	}
       
  2351 }
       
  2352 
       
  2353 /**
       
  2354  * The WordPress automatic background updater.
       
  2355  *
       
  2356  * @package WordPress
       
  2357  * @subpackage Upgrader
       
  2358  * @since 3.7.0
       
  2359  */
       
  2360 class WP_Automatic_Updater {
       
  2361 
       
  2362 	/**
       
  2363 	 * Tracks update results during processing.
       
  2364 	 *
       
  2365 	 * @var array
       
  2366 	 */
       
  2367 	protected $update_results = array();
       
  2368 
       
  2369 	/**
       
  2370 	 * Whether the entire automatic updater is disabled.
       
  2371 	 *
       
  2372 	 * @since 3.7.0
       
  2373 	 */
       
  2374 	public function is_disabled() {
       
  2375 		// Background updates are disabled if you don't want file changes.
       
  2376 		if ( defined( 'DISALLOW_FILE_MODS' ) && DISALLOW_FILE_MODS )
       
  2377 			return true;
       
  2378 
       
  2379 		if ( defined( 'WP_INSTALLING' ) )
       
  2380 			return true;
       
  2381 
       
  2382 		// More fine grained control can be done through the WP_AUTO_UPDATE_CORE constant and filters.
       
  2383 		$disabled = defined( 'AUTOMATIC_UPDATER_DISABLED' ) && AUTOMATIC_UPDATER_DISABLED;
       
  2384 
       
  2385 		/**
       
  2386 		 * Filter whether to entirely disable background updates.
       
  2387 		 *
       
  2388 		 * There are more fine-grained filters and controls for selective disabling.
       
  2389 		 * This filter parallels the AUTOMATIC_UPDATER_DISABLED constant in name.
       
  2390 		 *
       
  2391 		 * This also disables update notification emails. That may change in the future.
       
  2392 		 *
       
  2393 		 * @since 3.7.0
       
  2394 		 *
       
  2395 		 * @param bool $disabled Whether the updater should be disabled.
       
  2396 		 */
       
  2397 		return apply_filters( 'automatic_updater_disabled', $disabled );
       
  2398 	}
       
  2399 
       
  2400 	/**
       
  2401 	 * Check for version control checkouts.
       
  2402 	 *
       
  2403 	 * Checks for Subversion, Git, Mercurial, and Bazaar. It recursively looks up the
       
  2404 	 * filesystem to the top of the drive, erring on the side of detecting a VCS
       
  2405 	 * checkout somewhere.
       
  2406 	 *
       
  2407 	 * ABSPATH is always checked in addition to whatever $context is (which may be the
       
  2408 	 * wp-content directory, for example). The underlying assumption is that if you are
       
  2409 	 * using version control *anywhere*, then you should be making decisions for
       
  2410 	 * how things get updated.
       
  2411 	 *
       
  2412 	 * @since 3.7.0
       
  2413 	 *
       
  2414 	 * @param string $context The filesystem path to check, in addition to ABSPATH.
       
  2415 	 */
       
  2416 	public function is_vcs_checkout( $context ) {
       
  2417 		$context_dirs = array( untrailingslashit( $context ) );
       
  2418 		if ( $context !== ABSPATH )
       
  2419 			$context_dirs[] = untrailingslashit( ABSPATH );
       
  2420 
       
  2421 		$vcs_dirs = array( '.svn', '.git', '.hg', '.bzr' );
       
  2422 		$check_dirs = array();
       
  2423 
       
  2424 		foreach ( $context_dirs as $context_dir ) {
       
  2425 			// Walk up from $context_dir to the root.
       
  2426 			do {
       
  2427 				$check_dirs[] = $context_dir;
       
  2428 
       
  2429 				// Once we've hit '/' or 'C:\', we need to stop. dirname will keep returning the input here.
       
  2430 				if ( $context_dir == dirname( $context_dir ) )
       
  2431 					break;
       
  2432 
       
  2433 			// Continue one level at a time.
       
  2434 			} while ( $context_dir = dirname( $context_dir ) );
       
  2435 		}
       
  2436 
       
  2437 		$check_dirs = array_unique( $check_dirs );
       
  2438 
       
  2439 		// Search all directories we've found for evidence of version control.
       
  2440 		foreach ( $vcs_dirs as $vcs_dir ) {
       
  2441 			foreach ( $check_dirs as $check_dir ) {
       
  2442 				if ( $checkout = @is_dir( rtrim( $check_dir, '\\/' ) . "/$vcs_dir" ) )
       
  2443 					break 2;
       
  2444 			}
       
  2445 		}
       
  2446 
       
  2447 		/**
       
  2448 		 * Filter whether the automatic updater should consider a filesystem
       
  2449 		 * location to be potentially managed by a version control system.
       
  2450 		 *
       
  2451 		 * @since 3.7.0
       
  2452 		 *
       
  2453 		 * @param bool $checkout  Whether a VCS checkout was discovered at $context
       
  2454 		 *                        or ABSPATH, or anywhere higher.
       
  2455 		 * @param string $context The filesystem context (a path) against which
       
  2456 		 *                        filesystem status should be checked.
       
  2457 		 */
       
  2458 		return apply_filters( 'automatic_updates_is_vcs_checkout', $checkout, $context );
       
  2459 	}
       
  2460 
       
  2461 	/**
       
  2462 	 * Tests to see if we can and should update a specific item.
       
  2463 	 *
       
  2464 	 * @since 3.7.0
       
  2465 	 *
       
  2466 	 * @param string $type    The type of update being checked: 'core', 'theme',
       
  2467 	 *                        'plugin', 'translation'.
       
  2468 	 * @param object $item    The update offer.
       
  2469 	 * @param string $context The filesystem context (a path) against which filesystem
       
  2470 	 *                        access and status should be checked.
       
  2471 	 */
       
  2472 	public function should_update( $type, $item, $context ) {
       
  2473 		// Used to see if WP_Filesystem is set up to allow unattended updates.
       
  2474 		$skin = new Automatic_Upgrader_Skin;
       
  2475 
       
  2476 		if ( $this->is_disabled() )
       
  2477 			return false;
       
  2478 
       
  2479 		// Only relax the filesystem checks when the update doesn't include new files
       
  2480 		$allow_relaxed_file_ownership = false;
       
  2481 		if ( 'core' == $type && isset( $item->new_files ) && ! $item->new_files ) {
       
  2482 			$allow_relaxed_file_ownership = true;
       
  2483 		}
       
  2484 
       
  2485 		// If we can't do an auto core update, we may still be able to email the user.
       
  2486 		if ( ! $skin->request_filesystem_credentials( false, $context, $allow_relaxed_file_ownership ) || $this->is_vcs_checkout( $context ) ) {
       
  2487 			if ( 'core' == $type )
       
  2488 				$this->send_core_update_notification_email( $item );
       
  2489 			return false;
       
  2490 		}
       
  2491 
       
  2492 		// Next up, is this an item we can update?
       
  2493 		if ( 'core' == $type )
       
  2494 			$update = Core_Upgrader::should_update_to_version( $item->current );
       
  2495 		else
       
  2496 			$update = ! empty( $item->autoupdate );
       
  2497 
       
  2498 		/**
       
  2499 		 * Filter whether to automatically update core, a plugin, a theme, or a language.
       
  2500 		 *
       
  2501 		 * The dynamic portion of the hook name, `$type`, refers to the type of update
       
  2502 		 * being checked. Can be 'core', 'theme', 'plugin', or 'translation'.
       
  2503 		 *
       
  2504 		 * Generally speaking, plugins, themes, and major core versions are not updated
       
  2505 		 * by default, while translations and minor and development versions for core
       
  2506 		 * are updated by default.
       
  2507 		 *
       
  2508 		 * See the {@see 'allow_dev_auto_core_updates', {@see 'allow_minor_auto_core_updates'},
       
  2509 		 * and {@see 'allow_major_auto_core_updates'} filters for a more straightforward way to
       
  2510 		 * adjust core updates.
       
  2511 		 *
       
  2512 		 * @since 3.7.0
       
  2513 		 *
       
  2514 		 * @param bool   $update Whether to update.
       
  2515 		 * @param object $item   The update offer.
       
  2516 		 */
       
  2517 		$update = apply_filters( 'auto_update_' . $type, $update, $item );
       
  2518 
       
  2519 		if ( ! $update ) {
       
  2520 			if ( 'core' == $type )
       
  2521 				$this->send_core_update_notification_email( $item );
       
  2522 			return false;
       
  2523 		}
       
  2524 
       
  2525 		// If it's a core update, are we actually compatible with its requirements?
       
  2526 		if ( 'core' == $type ) {
       
  2527 			global $wpdb;
       
  2528 
       
  2529 			$php_compat = version_compare( phpversion(), $item->php_version, '>=' );
       
  2530 			if ( file_exists( WP_CONTENT_DIR . '/db.php' ) && empty( $wpdb->is_mysql ) )
       
  2531 				$mysql_compat = true;
       
  2532 			else
       
  2533 				$mysql_compat = version_compare( $wpdb->db_version(), $item->mysql_version, '>=' );
       
  2534 
       
  2535 			if ( ! $php_compat || ! $mysql_compat )
       
  2536 				return false;
       
  2537 		}
       
  2538 
       
  2539 		return true;
       
  2540 	}
       
  2541 
       
  2542 	/**
       
  2543 	 * Notifies an administrator of a core update.
       
  2544 	 *
       
  2545 	 * @since 3.7.0
       
  2546 	 *
       
  2547 	 * @param object $item The update offer.
       
  2548 	 */
       
  2549 	protected function send_core_update_notification_email( $item ) {
       
  2550 		$notified = get_site_option( 'auto_core_update_notified' );
       
  2551 
       
  2552 		// Don't notify if we've already notified the same email address of the same version.
       
  2553 		if ( $notified && $notified['email'] == get_site_option( 'admin_email' ) && $notified['version'] == $item->current )
       
  2554 			return false;
       
  2555 
       
  2556 		// See if we need to notify users of a core update.
       
  2557 		$notify = ! empty( $item->notify_email );
       
  2558 
       
  2559 		/**
       
  2560 		 * Filter whether to notify the site administrator of a new core update.
       
  2561 		 *
       
  2562 		 * By default, administrators are notified when the update offer received
       
  2563 		 * from WordPress.org sets a particular flag. This allows some discretion
       
  2564 		 * in if and when to notify.
       
  2565 		 *
       
  2566 		 * This filter is only evaluated once per release. If the same email address
       
  2567 		 * was already notified of the same new version, WordPress won't repeatedly
       
  2568 		 * email the administrator.
       
  2569 		 *
       
  2570 		 * This filter is also used on about.php to check if a plugin has disabled
       
  2571 		 * these notifications.
       
  2572 		 *
       
  2573 		 * @since 3.7.0
       
  2574 		 *
       
  2575 		 * @param bool   $notify Whether the site administrator is notified.
       
  2576 		 * @param object $item   The update offer.
       
  2577 		 */
       
  2578 		if ( ! apply_filters( 'send_core_update_notification_email', $notify, $item ) )
       
  2579 			return false;
       
  2580 
       
  2581 		$this->send_email( 'manual', $item );
       
  2582 		return true;
       
  2583 	}
       
  2584 
       
  2585 	/**
       
  2586 	 * Update an item, if appropriate.
       
  2587 	 *
       
  2588 	 * @since 3.7.0
       
  2589 	 *
       
  2590 	 * @param string $type The type of update being checked: 'core', 'theme', 'plugin', 'translation'.
       
  2591 	 * @param object $item The update offer.
       
  2592 	 */
       
  2593 	public function update( $type, $item ) {
       
  2594 		$skin = new Automatic_Upgrader_Skin;
       
  2595 
       
  2596 		switch ( $type ) {
       
  2597 			case 'core':
       
  2598 				// The Core upgrader doesn't use the Upgrader's skin during the actual main part of the upgrade, instead, firing a filter.
       
  2599 				add_filter( 'update_feedback', array( $skin, 'feedback' ) );
       
  2600 				$upgrader = new Core_Upgrader( $skin );
       
  2601 				$context  = ABSPATH;
       
  2602 				break;
       
  2603 			case 'plugin':
       
  2604 				$upgrader = new Plugin_Upgrader( $skin );
       
  2605 				$context  = WP_PLUGIN_DIR; // We don't support custom Plugin directories, or updates for WPMU_PLUGIN_DIR
       
  2606 				break;
       
  2607 			case 'theme':
       
  2608 				$upgrader = new Theme_Upgrader( $skin );
       
  2609 				$context  = get_theme_root( $item->theme );
       
  2610 				break;
       
  2611 			case 'translation':
       
  2612 				$upgrader = new Language_Pack_Upgrader( $skin );
       
  2613 				$context  = WP_CONTENT_DIR; // WP_LANG_DIR;
       
  2614 				break;
       
  2615 		}
       
  2616 
       
  2617 		// Determine whether we can and should perform this update.
       
  2618 		if ( ! $this->should_update( $type, $item, $context ) )
       
  2619 			return false;
       
  2620 
       
  2621 		$upgrader_item = $item;
       
  2622 		switch ( $type ) {
       
  2623 			case 'core':
       
  2624 				$skin->feedback( __( 'Updating to WordPress %s' ), $item->version );
       
  2625 				$item_name = sprintf( __( 'WordPress %s' ), $item->version );
       
  2626 				break;
       
  2627 			case 'theme':
       
  2628 				$upgrader_item = $item->theme;
       
  2629 				$theme = wp_get_theme( $upgrader_item );
       
  2630 				$item_name = $theme->Get( 'Name' );
       
  2631 				$skin->feedback( __( 'Updating theme: %s' ), $item_name );
       
  2632 				break;
       
  2633 			case 'plugin':
       
  2634 				$upgrader_item = $item->plugin;
       
  2635 				$plugin_data = get_plugin_data( $context . '/' . $upgrader_item );
       
  2636 				$item_name = $plugin_data['Name'];
       
  2637 				$skin->feedback( __( 'Updating plugin: %s' ), $item_name );
       
  2638 				break;
       
  2639 			case 'translation':
       
  2640 				$language_item_name = $upgrader->get_name_for_update( $item );
       
  2641 				$item_name = sprintf( __( 'Translations for %s' ), $language_item_name );
       
  2642 				$skin->feedback( sprintf( __( 'Updating translations for %1$s (%2$s)&#8230;' ), $language_item_name, $item->language ) );
       
  2643 				break;
       
  2644 		}
       
  2645 
       
  2646 		$allow_relaxed_file_ownership = false;
       
  2647 		if ( 'core' == $type && isset( $item->new_files ) && ! $item->new_files ) {
       
  2648 			$allow_relaxed_file_ownership = true;
       
  2649 		}
       
  2650 
       
  2651 		// Boom, This sites about to get a whole new splash of paint!
       
  2652 		$upgrade_result = $upgrader->upgrade( $upgrader_item, array(
       
  2653 			'clear_update_cache' => false,
       
  2654 			// Always use partial builds if possible for core updates.
       
  2655 			'pre_check_md5'      => false,
       
  2656 			// Only available for core updates.
       
  2657 			'attempt_rollback'   => true,
       
  2658 			// Allow relaxed file ownership in some scenarios
       
  2659 			'allow_relaxed_file_ownership' => $allow_relaxed_file_ownership,
       
  2660 		) );
       
  2661 
       
  2662 		// If the filesystem is unavailable, false is returned.
       
  2663 		if ( false === $upgrade_result ) {
       
  2664 			$upgrade_result = new WP_Error( 'fs_unavailable', __( 'Could not access filesystem.' ) );
       
  2665 		}
       
  2666 
       
  2667 		// Core doesn't output this, so let's append it so we don't get confused.
       
  2668 		if ( 'core' == $type ) {
       
  2669 			if ( is_wp_error( $upgrade_result ) ) {
       
  2670 				$skin->error( __( 'Installation Failed' ), $upgrade_result );
       
  2671 			} else {
       
  2672 				$skin->feedback( __( 'WordPress updated successfully' ) );
       
  2673 			}
       
  2674 		}
       
  2675 
       
  2676 		$this->update_results[ $type ][] = (object) array(
       
  2677 			'item'     => $item,
       
  2678 			'result'   => $upgrade_result,
       
  2679 			'name'     => $item_name,
       
  2680 			'messages' => $skin->get_upgrade_messages()
       
  2681 		);
       
  2682 
       
  2683 		return $upgrade_result;
       
  2684 	}
       
  2685 
       
  2686 	/**
       
  2687 	 * Kicks off the background update process, looping through all pending updates.
       
  2688 	 *
       
  2689 	 * @since 3.7.0
       
  2690 	 */
       
  2691 	public function run() {
       
  2692 		global $wpdb, $wp_version;
       
  2693 
       
  2694 		if ( $this->is_disabled() )
       
  2695 			return;
       
  2696 
       
  2697 		if ( ! is_main_network() || ! is_main_site() )
       
  2698 			return;
       
  2699 
       
  2700 		$lock_name = 'auto_updater.lock';
       
  2701 
       
  2702 		// Try to lock
       
  2703 		$lock_result = $wpdb->query( $wpdb->prepare( "INSERT IGNORE INTO `$wpdb->options` ( `option_name`, `option_value`, `autoload` ) VALUES (%s, %s, 'no') /* LOCK */", $lock_name, time() ) );
       
  2704 
       
  2705 		if ( ! $lock_result ) {
       
  2706 			$lock_result = get_option( $lock_name );
       
  2707 
       
  2708 			// If we couldn't create a lock, and there isn't a lock, bail
       
  2709 			if ( ! $lock_result )
       
  2710 				return;
       
  2711 
       
  2712 			// Check to see if the lock is still valid
       
  2713 			if ( $lock_result > ( time() - HOUR_IN_SECONDS ) )
       
  2714 				return;
       
  2715 		}
       
  2716 
       
  2717 		// Update the lock, as by this point we've definitely got a lock, just need to fire the actions
       
  2718 		update_option( $lock_name, time() );
       
  2719 
       
  2720 		// Don't automatically run these thins, as we'll handle it ourselves
       
  2721 		remove_action( 'upgrader_process_complete', array( 'Language_Pack_Upgrader', 'async_upgrade' ), 20 );
       
  2722 		remove_action( 'upgrader_process_complete', 'wp_version_check' );
       
  2723 		remove_action( 'upgrader_process_complete', 'wp_update_plugins' );
       
  2724 		remove_action( 'upgrader_process_complete', 'wp_update_themes' );
       
  2725 
       
  2726 		// Next, Plugins
       
  2727 		wp_update_plugins(); // Check for Plugin updates
       
  2728 		$plugin_updates = get_site_transient( 'update_plugins' );
       
  2729 		if ( $plugin_updates && !empty( $plugin_updates->response ) ) {
       
  2730 			foreach ( $plugin_updates->response as $plugin ) {
       
  2731 				$this->update( 'plugin', $plugin );
       
  2732 			}
       
  2733 			// Force refresh of plugin update information
       
  2734 			wp_clean_plugins_cache();
       
  2735 		}
       
  2736 
       
  2737 		// Next, those themes we all love
       
  2738 		wp_update_themes();  // Check for Theme updates
       
  2739 		$theme_updates = get_site_transient( 'update_themes' );
       
  2740 		if ( $theme_updates && !empty( $theme_updates->response ) ) {
       
  2741 			foreach ( $theme_updates->response as $theme ) {
       
  2742 				$this->update( 'theme', (object) $theme );
       
  2743 			}
       
  2744 			// Force refresh of theme update information
       
  2745 			wp_clean_themes_cache();
       
  2746 		}
       
  2747 
       
  2748 		// Next, Process any core update
       
  2749 		wp_version_check(); // Check for Core updates
       
  2750 		$core_update = find_core_auto_update();
       
  2751 
       
  2752 		if ( $core_update )
       
  2753 			$this->update( 'core', $core_update );
       
  2754 
       
  2755 		// Clean up, and check for any pending translations
       
  2756 		// (Core_Upgrader checks for core updates)
       
  2757 		$theme_stats = array();
       
  2758 		if ( isset( $this->update_results['theme'] ) ) {
       
  2759 			foreach ( $this->update_results['theme'] as $upgrade ) {
       
  2760 				$theme_stats[ $upgrade->item->theme ] = ( true === $upgrade->result );
       
  2761 			}
       
  2762 		}
       
  2763 		wp_update_themes( $theme_stats );  // Check for Theme updates
       
  2764 
       
  2765 		$plugin_stats = array();
       
  2766 		if ( isset( $this->update_results['plugin'] ) ) {
       
  2767 			foreach ( $this->update_results['plugin'] as $upgrade ) {
       
  2768 				$plugin_stats[ $upgrade->item->plugin ] = ( true === $upgrade->result );
       
  2769 			}
       
  2770 		}
       
  2771 		wp_update_plugins( $plugin_stats ); // Check for Plugin updates
       
  2772 
       
  2773 		// Finally, Process any new translations
       
  2774 		$language_updates = wp_get_translation_updates();
       
  2775 		if ( $language_updates ) {
       
  2776 			foreach ( $language_updates as $update ) {
       
  2777 				$this->update( 'translation', $update );
       
  2778 			}
       
  2779 
       
  2780 			// Clear existing caches
       
  2781 			wp_clean_update_cache();
       
  2782 
       
  2783 			wp_version_check();  // check for Core updates
       
  2784 			wp_update_themes();  // Check for Theme updates
       
  2785 			wp_update_plugins(); // Check for Plugin updates
       
  2786 		}
       
  2787 
       
  2788 		// Send debugging email to all development installs.
       
  2789 		if ( ! empty( $this->update_results ) ) {
       
  2790 			$development_version = false !== strpos( $wp_version, '-' );
       
  2791 
       
  2792 			/**
       
  2793 			 * Filter whether to send a debugging email for each automatic background update.
       
  2794 			 *
       
  2795 			 * @since 3.7.0
       
  2796 			 *
       
  2797 			 * @param bool $development_version By default, emails are sent if the
       
  2798 			 *                                  install is a development version.
       
  2799 			 *                                  Return false to avoid the email.
       
  2800 			 */
       
  2801 			if ( apply_filters( 'automatic_updates_send_debug_email', $development_version ) )
       
  2802 				$this->send_debug_email();
       
  2803 
       
  2804 			if ( ! empty( $this->update_results['core'] ) )
       
  2805 				$this->after_core_update( $this->update_results['core'][0] );
       
  2806 
       
  2807 			/**
       
  2808 			 * Fires after all automatic updates have run.
       
  2809 			 *
       
  2810 			 * @since 3.8.0
       
  2811 			 *
       
  2812 			 * @param array $update_results The results of all attempted updates.
       
  2813 			 */
       
  2814 			do_action( 'automatic_updates_complete', $this->update_results );
       
  2815 		}
       
  2816 
       
  2817 		// Clear the lock
       
  2818 		delete_option( $lock_name );
       
  2819 	}
       
  2820 
       
  2821 	/**
       
  2822 	 * If we tried to perform a core update, check if we should send an email,
       
  2823 	 * and if we need to avoid processing future updates.
       
  2824 	 *
       
  2825 	 * @param object $update_result The result of the core update. Includes the update offer and result.
       
  2826 	 */
       
  2827 	protected function after_core_update( $update_result ) {
       
  2828 		global $wp_version;
       
  2829 
       
  2830 		$core_update = $update_result->item;
       
  2831 		$result      = $update_result->result;
       
  2832 
       
  2833 		if ( ! is_wp_error( $result ) ) {
       
  2834 			$this->send_email( 'success', $core_update );
       
  2835 			return;
       
  2836 		}
       
  2837 
       
  2838 		$error_code = $result->get_error_code();
       
  2839 
       
  2840 		// Any of these WP_Error codes are critical failures, as in they occurred after we started to copy core files.
       
  2841 		// We should not try to perform a background update again until there is a successful one-click update performed by the user.
       
  2842 		$critical = false;
       
  2843 		if ( $error_code === 'disk_full' || false !== strpos( $error_code, '__copy_dir' ) ) {
       
  2844 			$critical = true;
       
  2845 		} elseif ( $error_code === 'rollback_was_required' && is_wp_error( $result->get_error_data()->rollback ) ) {
       
  2846 			// A rollback is only critical if it failed too.
       
  2847 			$critical = true;
       
  2848 			$rollback_result = $result->get_error_data()->rollback;
       
  2849 		} elseif ( false !== strpos( $error_code, 'do_rollback' ) ) {
       
  2850 			$critical = true;
       
  2851 		}
       
  2852 
       
  2853 		if ( $critical ) {
       
  2854 			$critical_data = array(
       
  2855 				'attempted'  => $core_update->current,
       
  2856 				'current'    => $wp_version,
       
  2857 				'error_code' => $error_code,
       
  2858 				'error_data' => $result->get_error_data(),
       
  2859 				'timestamp'  => time(),
       
  2860 				'critical'   => true,
       
  2861 			);
       
  2862 			if ( isset( $rollback_result ) ) {
       
  2863 				$critical_data['rollback_code'] = $rollback_result->get_error_code();
       
  2864 				$critical_data['rollback_data'] = $rollback_result->get_error_data();
       
  2865 			}
       
  2866 			update_site_option( 'auto_core_update_failed', $critical_data );
       
  2867 			$this->send_email( 'critical', $core_update, $result );
       
  2868 			return;
       
  2869 		}
       
  2870 
       
  2871 		/*
       
  2872 		 * Any other WP_Error code (like download_failed or files_not_writable) occurs before
       
  2873 		 * we tried to copy over core files. Thus, the failures are early and graceful.
       
  2874 		 *
       
  2875 		 * We should avoid trying to perform a background update again for the same version.
       
  2876 		 * But we can try again if another version is released.
       
  2877 		 *
       
  2878 		 * For certain 'transient' failures, like download_failed, we should allow retries.
       
  2879 		 * In fact, let's schedule a special update for an hour from now. (It's possible
       
  2880 		 * the issue could actually be on WordPress.org's side.) If that one fails, then email.
       
  2881 		 */
       
  2882 		$send = true;
       
  2883   		$transient_failures = array( 'incompatible_archive', 'download_failed', 'insane_distro' );
       
  2884   		if ( in_array( $error_code, $transient_failures ) && ! get_site_option( 'auto_core_update_failed' ) ) {
       
  2885   			wp_schedule_single_event( time() + HOUR_IN_SECONDS, 'wp_maybe_auto_update' );
       
  2886   			$send = false;
       
  2887   		}
       
  2888 
       
  2889   		$n = get_site_option( 'auto_core_update_notified' );
       
  2890 		// Don't notify if we've already notified the same email address of the same version of the same notification type.
       
  2891 		if ( $n && 'fail' == $n['type'] && $n['email'] == get_site_option( 'admin_email' ) && $n['version'] == $core_update->current )
       
  2892 			$send = false;
       
  2893 
       
  2894 		update_site_option( 'auto_core_update_failed', array(
       
  2895 			'attempted'  => $core_update->current,
       
  2896 			'current'    => $wp_version,
       
  2897 			'error_code' => $error_code,
       
  2898 			'error_data' => $result->get_error_data(),
       
  2899 			'timestamp'  => time(),
       
  2900 			'retry'      => in_array( $error_code, $transient_failures ),
       
  2901 		) );
       
  2902 
       
  2903 		if ( $send )
       
  2904 			$this->send_email( 'fail', $core_update, $result );
       
  2905 	}
       
  2906 
       
  2907 	/**
       
  2908 	 * Sends an email upon the completion or failure of a background core update.
       
  2909 	 *
       
  2910 	 * @since 3.7.0
       
  2911 	 *
       
  2912 	 * @param string $type        The type of email to send. Can be one of 'success', 'fail', 'manual', 'critical'.
       
  2913 	 * @param object $core_update The update offer that was attempted.
       
  2914 	 * @param mixed  $result      Optional. The result for the core update. Can be WP_Error.
       
  2915 	 */
       
  2916 	protected function send_email( $type, $core_update, $result = null ) {
       
  2917 		update_site_option( 'auto_core_update_notified', array(
       
  2918 			'type'      => $type,
       
  2919 			'email'     => get_site_option( 'admin_email' ),
       
  2920 			'version'   => $core_update->current,
       
  2921 			'timestamp' => time(),
       
  2922 		) );
       
  2923 
       
  2924 		$next_user_core_update = get_preferred_from_update_core();
       
  2925 		// If the update transient is empty, use the update we just performed
       
  2926 		if ( ! $next_user_core_update )
       
  2927 			$next_user_core_update = $core_update;
       
  2928 		$newer_version_available = ( 'upgrade' == $next_user_core_update->response && version_compare( $next_user_core_update->version, $core_update->version, '>' ) );
       
  2929 
       
  2930 		/**
       
  2931 		 * Filter whether to send an email following an automatic background core update.
       
  2932 		 *
       
  2933 		 * @since 3.7.0
       
  2934 		 *
       
  2935 		 * @param bool   $send        Whether to send the email. Default true.
       
  2936 		 * @param string $type        The type of email to send. Can be one of
       
  2937 		 *                            'success', 'fail', 'critical'.
       
  2938 		 * @param object $core_update The update offer that was attempted.
       
  2939 		 * @param mixed  $result      The result for the core update. Can be WP_Error.
       
  2940 		 */
       
  2941 		if ( 'manual' !== $type && ! apply_filters( 'auto_core_update_send_email', true, $type, $core_update, $result ) )
       
  2942 			return;
       
  2943 
       
  2944 		switch ( $type ) {
       
  2945 			case 'success' : // We updated.
       
  2946 				/* translators: 1: Site name, 2: WordPress version number. */
       
  2947 				$subject = __( '[%1$s] Your site has updated to WordPress %2$s' );
       
  2948 				break;
       
  2949 
       
  2950 			case 'fail' :   // We tried to update but couldn't.
       
  2951 			case 'manual' : // We can't update (and made no attempt).
       
  2952 				/* translators: 1: Site name, 2: WordPress version number. */
       
  2953 				$subject = __( '[%1$s] WordPress %2$s is available. Please update!' );
       
  2954 				break;
       
  2955 
       
  2956 			case 'critical' : // We tried to update, started to copy files, then things went wrong.
       
  2957 				/* translators: 1: Site name. */
       
  2958 				$subject = __( '[%1$s] URGENT: Your site may be down due to a failed update' );
       
  2959 				break;
       
  2960 
       
  2961 			default :
       
  2962 				return;
       
  2963 		}
       
  2964 
       
  2965 		// If the auto update is not to the latest version, say that the current version of WP is available instead.
       
  2966 		$version = 'success' === $type ? $core_update->current : $next_user_core_update->current;
       
  2967 		$subject = sprintf( $subject, wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES ), $version );
       
  2968 
       
  2969 		$body = '';
       
  2970 
       
  2971 		switch ( $type ) {
       
  2972 			case 'success' :
       
  2973 				$body .= sprintf( __( 'Howdy! Your site at %1$s has been updated automatically to WordPress %2$s.' ), home_url(), $core_update->current );
       
  2974 				$body .= "\n\n";
       
  2975 				if ( ! $newer_version_available )
       
  2976 					$body .= __( 'No further action is needed on your part.' ) . ' ';
       
  2977 
       
  2978 				// Can only reference the About screen if their update was successful.
       
  2979 				list( $about_version ) = explode( '-', $core_update->current, 2 );
       
  2980 				$body .= sprintf( __( "For more on version %s, see the About WordPress screen:" ), $about_version );
       
  2981 				$body .= "\n" . admin_url( 'about.php' );
       
  2982 
       
  2983 				if ( $newer_version_available ) {
       
  2984 					$body .= "\n\n" . sprintf( __( 'WordPress %s is also now available.' ), $next_user_core_update->current ) . ' ';
       
  2985 					$body .= __( 'Updating is easy and only takes a few moments:' );
       
  2986 					$body .= "\n" . network_admin_url( 'update-core.php' );
       
  2987 				}
       
  2988 
       
  2989 				break;
       
  2990 
       
  2991 			case 'fail' :
       
  2992 			case 'manual' :
       
  2993 				$body .= sprintf( __( 'Please update your site at %1$s to WordPress %2$s.' ), home_url(), $next_user_core_update->current );
       
  2994 
       
  2995 				$body .= "\n\n";
       
  2996 
       
  2997 				// Don't show this message if there is a newer version available.
       
  2998 				// Potential for confusion, and also not useful for them to know at this point.
       
  2999 				if ( 'fail' == $type && ! $newer_version_available )
       
  3000 					$body .= __( 'We tried but were unable to update your site automatically.' ) . ' ';
       
  3001 
       
  3002 				$body .= __( 'Updating is easy and only takes a few moments:' );
       
  3003 				$body .= "\n" . network_admin_url( 'update-core.php' );
       
  3004 				break;
       
  3005 
       
  3006 			case 'critical' :
       
  3007 				if ( $newer_version_available )
       
  3008 					$body .= sprintf( __( 'Your site at %1$s experienced a critical failure while trying to update WordPress to version %2$s.' ), home_url(), $core_update->current );
       
  3009 				else
       
  3010 					$body .= sprintf( __( 'Your site at %1$s experienced a critical failure while trying to update to the latest version of WordPress, %2$s.' ), home_url(), $core_update->current );
       
  3011 
       
  3012 				$body .= "\n\n" . __( "This means your site may be offline or broken. Don't panic; this can be fixed." );
       
  3013 
       
  3014 				$body .= "\n\n" . __( "Please check out your site now. It's possible that everything is working. If it says you need to update, you should do so:" );
       
  3015 				$body .= "\n" . network_admin_url( 'update-core.php' );
       
  3016 				break;
       
  3017 		}
       
  3018 
       
  3019 		$critical_support = 'critical' === $type && ! empty( $core_update->support_email );
       
  3020 		if ( $critical_support ) {
       
  3021 			// Support offer if available.
       
  3022 			$body .= "\n\n" . sprintf( __( "The WordPress team is willing to help you. Forward this email to %s and the team will work with you to make sure your site is working." ), $core_update->support_email );
       
  3023 		} else {
       
  3024 			// Add a note about the support forums.
       
  3025 			$body .= "\n\n" . __( 'If you experience any issues or need support, the volunteers in the WordPress.org support forums may be able to help.' );
       
  3026 			$body .= "\n" . __( 'https://wordpress.org/support/' );
       
  3027 		}
       
  3028 
       
  3029 		// Updates are important!
       
  3030 		if ( $type != 'success' || $newer_version_available ) {
       
  3031 			$body .= "\n\n" . __( 'Keeping your site updated is important for security. It also makes the internet a safer place for you and your readers.' );
       
  3032 		}
       
  3033 
       
  3034 		if ( $critical_support ) {
       
  3035 			$body .= " " . __( "If you reach out to us, we'll also ensure you'll never have this problem again." );
       
  3036 		}
       
  3037 
       
  3038 		// If things are successful and we're now on the latest, mention plugins and themes if any are out of date.
       
  3039 		if ( $type == 'success' && ! $newer_version_available && ( get_plugin_updates() || get_theme_updates() ) ) {
       
  3040 			$body .= "\n\n" . __( 'You also have some plugins or themes with updates available. Update them now:' );
       
  3041 			$body .= "\n" . network_admin_url();
       
  3042 		}
       
  3043 
       
  3044 		$body .= "\n\n" . __( 'The WordPress Team' ) . "\n";
       
  3045 
       
  3046 		if ( 'critical' == $type && is_wp_error( $result ) ) {
       
  3047 			$body .= "\n***\n\n";
       
  3048 			$body .= sprintf( __( 'Your site was running version %s.' ), $GLOBALS['wp_version'] );
       
  3049 			$body .= ' ' . __( 'We have some data that describes the error your site encountered.' );
       
  3050 			$body .= ' ' . __( 'Your hosting company, support forum volunteers, or a friendly developer may be able to use this information to help you:' );
       
  3051 
       
  3052 			// If we had a rollback and we're still critical, then the rollback failed too.
       
  3053 			// Loop through all errors (the main WP_Error, the update result, the rollback result) for code, data, etc.
       
  3054 			if ( 'rollback_was_required' == $result->get_error_code() )
       
  3055 				$errors = array( $result, $result->get_error_data()->update, $result->get_error_data()->rollback );
       
  3056 			else
       
  3057 				$errors = array( $result );
       
  3058 
       
  3059 			foreach ( $errors as $error ) {
       
  3060 				if ( ! is_wp_error( $error ) )
       
  3061 					continue;
       
  3062 				$error_code = $error->get_error_code();
       
  3063 				$body .= "\n\n" . sprintf( __( "Error code: %s" ), $error_code );
       
  3064 				if ( 'rollback_was_required' == $error_code )
       
  3065 					continue;
       
  3066 				if ( $error->get_error_message() )
       
  3067 					$body .= "\n" . $error->get_error_message();
       
  3068 				$error_data = $error->get_error_data();
       
  3069 				if ( $error_data )
       
  3070 					$body .= "\n" . implode( ', ', (array) $error_data );
       
  3071 			}
       
  3072 			$body .= "\n";
       
  3073 		}
       
  3074 
       
  3075 		$to  = get_site_option( 'admin_email' );
       
  3076 		$headers = '';
       
  3077 
       
  3078 		$email = compact( 'to', 'subject', 'body', 'headers' );
       
  3079 
       
  3080 		/**
       
  3081 		 * Filter the email sent following an automatic background core update.
       
  3082 		 *
       
  3083 		 * @since 3.7.0
       
  3084 		 *
       
  3085 		 * @param array $email {
       
  3086 		 *     Array of email arguments that will be passed to wp_mail().
       
  3087 		 *
       
  3088 		 *     @type string $to      The email recipient. An array of emails
       
  3089 		 *                            can be returned, as handled by wp_mail().
       
  3090 		 *     @type string $subject The email's subject.
       
  3091 		 *     @type string $body    The email message body.
       
  3092 		 *     @type string $headers Any email headers, defaults to no headers.
       
  3093 		 * }
       
  3094 		 * @param string $type        The type of email being sent. Can be one of
       
  3095 		 *                            'success', 'fail', 'manual', 'critical'.
       
  3096 		 * @param object $core_update The update offer that was attempted.
       
  3097 		 * @param mixed  $result      The result for the core update. Can be WP_Error.
       
  3098 		 */
       
  3099 		$email = apply_filters( 'auto_core_update_email', $email, $type, $core_update, $result );
       
  3100 
       
  3101 		wp_mail( $email['to'], wp_specialchars_decode( $email['subject'] ), $email['body'], $email['headers'] );
       
  3102 	}
       
  3103 
       
  3104 	/**
       
  3105 	 * Prepares and sends an email of a full log of background update results, useful for debugging and geekery.
       
  3106 	 *
       
  3107 	 * @since 3.7.0
       
  3108 	 */
       
  3109 	protected function send_debug_email() {
       
  3110 		$update_count = 0;
       
  3111 		foreach ( $this->update_results as $type => $updates )
       
  3112 			$update_count += count( $updates );
       
  3113 
       
  3114 		$body = array();
       
  3115 		$failures = 0;
       
  3116 
       
  3117 		$body[] = sprintf( __( 'WordPress site: %s' ), network_home_url( '/' ) );
       
  3118 
       
  3119 		// Core
       
  3120 		if ( isset( $this->update_results['core'] ) ) {
       
  3121 			$result = $this->update_results['core'][0];
       
  3122 			if ( $result->result && ! is_wp_error( $result->result ) ) {
       
  3123 				$body[] = sprintf( __( 'SUCCESS: WordPress was successfully updated to %s' ), $result->name );
       
  3124 			} else {
       
  3125 				$body[] = sprintf( __( 'FAILED: WordPress failed to update to %s' ), $result->name );
       
  3126 				$failures++;
       
  3127 			}
       
  3128 			$body[] = '';
       
  3129 		}
       
  3130 
       
  3131 		// Plugins, Themes, Translations
       
  3132 		foreach ( array( 'plugin', 'theme', 'translation' ) as $type ) {
       
  3133 			if ( ! isset( $this->update_results[ $type ] ) )
       
  3134 				continue;
       
  3135 			$success_items = wp_list_filter( $this->update_results[ $type ], array( 'result' => true ) );
       
  3136 			if ( $success_items ) {
       
  3137 				$messages = array(
       
  3138 					'plugin'      => __( 'The following plugins were successfully updated:' ),
       
  3139 					'theme'       => __( 'The following themes were successfully updated:' ),
       
  3140 					'translation' => __( 'The following translations were successfully updated:' ),
       
  3141 				);
       
  3142 
       
  3143 				$body[] = $messages[ $type ];
       
  3144 				foreach ( wp_list_pluck( $success_items, 'name' ) as $name ) {
       
  3145 					$body[] = ' * ' . sprintf( __( 'SUCCESS: %s' ), $name );
       
  3146 				}
       
  3147 			}
       
  3148 			if ( $success_items != $this->update_results[ $type ] ) {
       
  3149 				// Failed updates
       
  3150 				$messages = array(
       
  3151 					'plugin'      => __( 'The following plugins failed to update:' ),
       
  3152 					'theme'       => __( 'The following themes failed to update:' ),
       
  3153 					'translation' => __( 'The following translations failed to update:' ),
       
  3154 				);
       
  3155 
       
  3156 				$body[] = $messages[ $type ];
       
  3157 				foreach ( $this->update_results[ $type ] as $item ) {
       
  3158 					if ( ! $item->result || is_wp_error( $item->result ) ) {
       
  3159 						$body[] = ' * ' . sprintf( __( 'FAILED: %s' ), $item->name );
       
  3160 						$failures++;
       
  3161 					}
       
  3162 				}
       
  3163 			}
       
  3164 			$body[] = '';
       
  3165 		}
       
  3166 
       
  3167 		$site_title = wp_specialchars_decode( get_bloginfo( 'name' ), ENT_QUOTES );
       
  3168 		if ( $failures ) {
       
  3169 			$body[] = trim( __(
       
  3170 "BETA TESTING?
       
  3171 =============
       
  3172 
       
  3173 This debugging email is sent when you are using a development version of WordPress.
       
  3174 
       
  3175 If you think these failures might be due to a bug in WordPress, could you report it?
       
  3176  * Open a thread in the support forums: https://wordpress.org/support/forum/alphabeta
       
  3177  * Or, if you're comfortable writing a bug report: https://core.trac.wordpress.org/
       
  3178 
       
  3179 Thanks! -- The WordPress Team" ) );
       
  3180 			$body[] = '';
       
  3181 
       
  3182 			$subject = sprintf( __( '[%s] There were failures during background updates' ), $site_title );
       
  3183 		} else {
       
  3184 			$subject = sprintf( __( '[%s] Background updates have finished' ), $site_title );
       
  3185 		}
       
  3186 
       
  3187 		$body[] = trim( __(
       
  3188 'UPDATE LOG
       
  3189 ==========' ) );
       
  3190 		$body[] = '';
       
  3191 
       
  3192 		foreach ( array( 'core', 'plugin', 'theme', 'translation' ) as $type ) {
       
  3193 			if ( ! isset( $this->update_results[ $type ] ) )
       
  3194 				continue;
       
  3195 			foreach ( $this->update_results[ $type ] as $update ) {
       
  3196 				$body[] = $update->name;
       
  3197 				$body[] = str_repeat( '-', strlen( $update->name ) );
       
  3198 				foreach ( $update->messages as $message )
       
  3199 					$body[] = "  " . html_entity_decode( str_replace( '&#8230;', '...', $message ) );
       
  3200 				if ( is_wp_error( $update->result ) ) {
       
  3201 					$results = array( 'update' => $update->result );
       
  3202 					// If we rolled back, we want to know an error that occurred then too.
       
  3203 					if ( 'rollback_was_required' === $update->result->get_error_code() )
       
  3204 						$results = (array) $update->result->get_error_data();
       
  3205 					foreach ( $results as $result_type => $result ) {
       
  3206 						if ( ! is_wp_error( $result ) )
       
  3207 							continue;
       
  3208 
       
  3209 						if ( 'rollback' === $result_type ) {
       
  3210 							/* translators: 1: Error code, 2: Error message. */
       
  3211 							$body[] = '  ' . sprintf( __( 'Rollback Error: [%1$s] %2$s' ), $result->get_error_code(), $result->get_error_message() );
       
  3212 						} else {
       
  3213 							/* translators: 1: Error code, 2: Error message. */
       
  3214 							$body[] = '  ' . sprintf( __( 'Error: [%1$s] %2$s' ), $result->get_error_code(), $result->get_error_message() );
       
  3215 						}
       
  3216 
       
  3217 						if ( $result->get_error_data() )
       
  3218 							$body[] = '         ' . implode( ', ', (array) $result->get_error_data() );
       
  3219 					}
       
  3220 				}
       
  3221 				$body[] = '';
       
  3222 			}
       
  3223 		}
       
  3224 
       
  3225 		$email = array(
       
  3226 			'to'      => get_site_option( 'admin_email' ),
       
  3227 			'subject' => $subject,
       
  3228 			'body'    => implode( "\n", $body ),
       
  3229 			'headers' => ''
       
  3230 		);
       
  3231 
       
  3232 		/**
       
  3233 		 * Filter the debug email that can be sent following an automatic
       
  3234 		 * background core update.
       
  3235 		 *
       
  3236 		 * @since 3.8.0
       
  3237 		 *
       
  3238 		 * @param array $email {
       
  3239 		 *     Array of email arguments that will be passed to wp_mail().
       
  3240 		 *
       
  3241 		 *     @type string $to      The email recipient. An array of emails
       
  3242 		 *                           can be returned, as handled by wp_mail().
       
  3243 		 *     @type string $subject Email subject.
       
  3244 		 *     @type string $body    Email message body.
       
  3245 		 *     @type string $headers Any email headers. Default empty.
       
  3246 		 * }
       
  3247 		 * @param int   $failures The number of failures encountered while upgrading.
       
  3248 		 * @param mixed $results  The results of all attempted updates.
       
  3249 		 */
       
  3250 		$email = apply_filters( 'automatic_updates_debug_email', $email, $failures, $this->update_results );
       
  3251 
       
  3252 		wp_mail( $email['to'], wp_specialchars_decode( $email['subject'] ), $email['body'], $email['headers'] );
       
  3253 	}
       
  3254 }