wp/wp-includes/update.php
changeset 0 d970ebf37754
child 5 5e2f62d02dcd
equal deleted inserted replaced
-1:000000000000 0:d970ebf37754
       
     1 <?php
       
     2 /**
       
     3  * A simple set of functions to check our version 1.0 update service.
       
     4  *
       
     5  * @package WordPress
       
     6  * @since 2.3.0
       
     7  */
       
     8 
       
     9 /**
       
    10  * Check WordPress version against the newest version.
       
    11  *
       
    12  * The WordPress version, PHP version, and Locale is sent. Checks against the
       
    13  * WordPress server at api.wordpress.org server. Will only check if WordPress
       
    14  * isn't installing.
       
    15  *
       
    16  * @package WordPress
       
    17  * @since 2.3.0
       
    18  * @uses $wp_version Used to check against the newest WordPress version.
       
    19  *
       
    20  * @param array $extra_stats Extra statistics to report to the WordPress.org API.
       
    21  * @return mixed Returns null if update is unsupported. Returns false if check is too soon.
       
    22  */
       
    23 function wp_version_check( $extra_stats = array() ) {
       
    24 	if ( defined('WP_INSTALLING') )
       
    25 		return;
       
    26 
       
    27 	global $wpdb, $wp_local_package;
       
    28 	include ABSPATH . WPINC . '/version.php'; // include an unmodified $wp_version
       
    29 	$php_version = phpversion();
       
    30 
       
    31 	$current = get_site_transient( 'update_core' );
       
    32 	$translations = wp_get_installed_translations( 'core' );
       
    33 
       
    34 	if ( ! is_object($current) ) {
       
    35 		$current = new stdClass;
       
    36 		$current->updates = array();
       
    37 		$current->version_checked = $wp_version;
       
    38 	}
       
    39 
       
    40 	// Wait 60 seconds between multiple version check requests
       
    41 	$timeout = 60;
       
    42 	$time_not_changed = isset( $current->last_checked ) && $timeout > ( time() - $current->last_checked );
       
    43 	if ( $time_not_changed && empty( $extra_stats ) )
       
    44 		return false;
       
    45 
       
    46 	$locale = get_locale();
       
    47 	/**
       
    48 	 * Filter the locale requested for WordPress core translations.
       
    49 	 *
       
    50 	 * @since 2.8.0
       
    51 	 *
       
    52 	 * @param string $locale Current locale.
       
    53 	 */
       
    54 	$locale = apply_filters( 'core_version_check_locale', $locale );
       
    55 
       
    56 	// Update last_checked for current to prevent multiple blocking requests if request hangs
       
    57 	$current->last_checked = time();
       
    58 	set_site_transient( 'update_core', $current );
       
    59 
       
    60 	if ( method_exists( $wpdb, 'db_version' ) )
       
    61 		$mysql_version = preg_replace('/[^0-9.].*/', '', $wpdb->db_version());
       
    62 	else
       
    63 		$mysql_version = 'N/A';
       
    64 
       
    65 	if ( is_multisite() ) {
       
    66 		$user_count = get_user_count();
       
    67 		$num_blogs = get_blog_count();
       
    68 		$wp_install = network_site_url();
       
    69 		$multisite_enabled = 1;
       
    70 	} else {
       
    71 		$user_count = count_users();
       
    72 		$user_count = $user_count['total_users'];
       
    73 		$multisite_enabled = 0;
       
    74 		$num_blogs = 1;
       
    75 		$wp_install = home_url( '/' );
       
    76 	}
       
    77 
       
    78 	$query = array(
       
    79 		'version'           => $wp_version,
       
    80 		'php'               => $php_version,
       
    81 		'locale'            => $locale,
       
    82 		'mysql'             => $mysql_version,
       
    83 		'local_package'     => isset( $wp_local_package ) ? $wp_local_package : '',
       
    84 		'blogs'             => $num_blogs,
       
    85 		'users'             => $user_count,
       
    86 		'multisite_enabled' => $multisite_enabled,
       
    87 	);
       
    88 
       
    89 	$post_body = array(
       
    90 		'translations' => json_encode( $translations ),
       
    91 	);
       
    92 
       
    93 	if ( $extra_stats )
       
    94 		$post_body = array_merge( $post_body, $extra_stats );
       
    95 
       
    96 	$url = $http_url = 'http://api.wordpress.org/core/version-check/1.7/?' . http_build_query( $query, null, '&' );
       
    97 	if ( $ssl = wp_http_supports( array( 'ssl' ) ) )
       
    98 		$url = set_url_scheme( $url, 'https' );
       
    99 
       
   100 	$options = array(
       
   101 		'timeout' => ( ( defined('DOING_CRON') && DOING_CRON ) ? 30 : 3 ),
       
   102 		'user-agent' => 'WordPress/' . $wp_version . '; ' . home_url( '/' ),
       
   103 		'headers' => array(
       
   104 			'wp_install' => $wp_install,
       
   105 			'wp_blog' => home_url( '/' )
       
   106 		),
       
   107 		'body' => $post_body,
       
   108 	);
       
   109 
       
   110 	$response = wp_remote_post( $url, $options );
       
   111 	if ( $ssl && is_wp_error( $response ) ) {
       
   112 		trigger_error( __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="http://wordpress.org/support/">support forums</a>.' ) . ' ' . '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)', headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE );
       
   113 		$response = wp_remote_post( $http_url, $options );
       
   114 	}
       
   115 
       
   116 	if ( is_wp_error( $response ) || 200 != wp_remote_retrieve_response_code( $response ) )
       
   117 		return false;
       
   118 
       
   119 	$body = trim( wp_remote_retrieve_body( $response ) );
       
   120 	$body = json_decode( $body, true );
       
   121 
       
   122 	if ( ! is_array( $body ) || ! isset( $body['offers'] ) )
       
   123 		return false;
       
   124 
       
   125 	$offers = $body['offers'];
       
   126 
       
   127 	foreach ( $offers as &$offer ) {
       
   128 		foreach ( $offer as $offer_key => $value ) {
       
   129 			if ( 'packages' == $offer_key )
       
   130 				$offer['packages'] = (object) array_intersect_key( array_map( 'esc_url', $offer['packages'] ),
       
   131 					array_fill_keys( array( 'full', 'no_content', 'new_bundled', 'partial', 'rollback' ), '' ) );
       
   132 			elseif ( 'download' == $offer_key )
       
   133 				$offer['download'] = esc_url( $value );
       
   134 			else
       
   135 				$offer[ $offer_key ] = esc_html( $value );
       
   136 		}
       
   137 		$offer = (object) array_intersect_key( $offer, array_fill_keys( array( 'response', 'download', 'locale',
       
   138 			'packages', 'current', 'version', 'php_version', 'mysql_version', 'new_bundled', 'partial_version', 'notify_email' ), '' ) );
       
   139 	}
       
   140 
       
   141 	$updates = new stdClass();
       
   142 	$updates->updates = $offers;
       
   143 	$updates->last_checked = time();
       
   144 	$updates->version_checked = $wp_version;
       
   145 
       
   146 	if ( isset( $body['translations'] ) )
       
   147 		$updates->translations = $body['translations'];
       
   148 
       
   149 	set_site_transient( 'update_core',  $updates);
       
   150 }
       
   151 
       
   152 /**
       
   153  * Check plugin versions against the latest versions hosted on WordPress.org.
       
   154  *
       
   155  * The WordPress version, PHP version, and Locale is sent along with a list of
       
   156  * all plugins installed. Checks against the WordPress server at
       
   157  * api.wordpress.org. Will only check if WordPress isn't installing.
       
   158  *
       
   159  * @package WordPress
       
   160  * @since 2.3.0
       
   161  * @uses $wp_version Used to notify the WordPress version.
       
   162  *
       
   163  * @return mixed Returns null if update is unsupported. Returns false if check is too soon.
       
   164  */
       
   165 function wp_update_plugins() {
       
   166 	include ABSPATH . WPINC . '/version.php'; // include an unmodified $wp_version
       
   167 
       
   168 	if ( defined('WP_INSTALLING') )
       
   169 		return false;
       
   170 
       
   171 	// If running blog-side, bail unless we've not checked in the last 12 hours
       
   172 	if ( !function_exists( 'get_plugins' ) )
       
   173 		require_once( ABSPATH . 'wp-admin/includes/plugin.php' );
       
   174 
       
   175 	$plugins = get_plugins();
       
   176 	$translations = wp_get_installed_translations( 'plugins' );
       
   177 
       
   178 	$active  = get_option( 'active_plugins', array() );
       
   179 	$current = get_site_transient( 'update_plugins' );
       
   180 	if ( ! is_object($current) )
       
   181 		$current = new stdClass;
       
   182 
       
   183 	$new_option = new stdClass;
       
   184 	$new_option->last_checked = time();
       
   185 
       
   186 	// Check for update on a different schedule, depending on the page.
       
   187 	switch ( current_filter() ) {
       
   188 		case 'upgrader_process_complete' :
       
   189 			$timeout = 0;
       
   190 			break;
       
   191 		case 'load-update-core.php' :
       
   192 			$timeout = MINUTE_IN_SECONDS;
       
   193 			break;
       
   194 		case 'load-plugins.php' :
       
   195 		case 'load-update.php' :
       
   196 			$timeout = HOUR_IN_SECONDS;
       
   197 			break;
       
   198 		default :
       
   199 			$timeout = 12 * HOUR_IN_SECONDS;
       
   200 	}
       
   201 
       
   202 	$time_not_changed = isset( $current->last_checked ) && $timeout > ( time() - $current->last_checked );
       
   203 
       
   204 	if ( $time_not_changed ) {
       
   205 		$plugin_changed = false;
       
   206 		foreach ( $plugins as $file => $p ) {
       
   207 			$new_option->checked[ $file ] = $p['Version'];
       
   208 
       
   209 			if ( !isset( $current->checked[ $file ] ) || strval($current->checked[ $file ]) !== strval($p['Version']) )
       
   210 				$plugin_changed = true;
       
   211 		}
       
   212 
       
   213 		if ( isset ( $current->response ) && is_array( $current->response ) ) {
       
   214 			foreach ( $current->response as $plugin_file => $update_details ) {
       
   215 				if ( ! isset($plugins[ $plugin_file ]) ) {
       
   216 					$plugin_changed = true;
       
   217 					break;
       
   218 				}
       
   219 			}
       
   220 		}
       
   221 
       
   222 		// Bail if we've checked recently and if nothing has changed
       
   223 		if ( ! $plugin_changed )
       
   224 			return false;
       
   225 	}
       
   226 
       
   227 	// Update last_checked for current to prevent multiple blocking requests if request hangs
       
   228 	$current->last_checked = time();
       
   229 	set_site_transient( 'update_plugins', $current );
       
   230 
       
   231 	$to_send = compact( 'plugins', 'active' );
       
   232 
       
   233 	$locales = array( get_locale() );
       
   234 	/**
       
   235 	 * Filter the locales requested for plugin translations.
       
   236 	 *
       
   237 	 * @since 3.7.0
       
   238 	 *
       
   239 	 * @param array $locales Plugin locale. Default is current locale of the site.
       
   240 	 */
       
   241 	$locales = apply_filters( 'plugins_update_check_locales', $locales );
       
   242 
       
   243 	$options = array(
       
   244 		'timeout' => ( ( defined('DOING_CRON') && DOING_CRON ) ? 30 : 3),
       
   245 		'body' => array(
       
   246 			'plugins'      => json_encode( $to_send ),
       
   247 			'translations' => json_encode( $translations ),
       
   248 			'locale'       => json_encode( $locales ),
       
   249 		),
       
   250 		'user-agent' => 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' )
       
   251 	);
       
   252 
       
   253 	$url = $http_url = 'http://api.wordpress.org/plugins/update-check/1.1/';
       
   254 	if ( $ssl = wp_http_supports( array( 'ssl' ) ) )
       
   255 		$url = set_url_scheme( $url, 'https' );
       
   256 
       
   257 	$raw_response = wp_remote_post( $url, $options );
       
   258 	if ( $ssl && is_wp_error( $raw_response ) ) {
       
   259 		trigger_error( __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="http://wordpress.org/support/">support forums</a>.' ) . ' ' . '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)', headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE );
       
   260 		$raw_response = wp_remote_post( $http_url, $options );
       
   261 	}
       
   262 
       
   263 	if ( is_wp_error( $raw_response ) || 200 != wp_remote_retrieve_response_code( $raw_response ) )
       
   264 		return false;
       
   265 
       
   266 	$response = json_decode( wp_remote_retrieve_body( $raw_response ), true );
       
   267 	foreach ( $response['plugins'] as &$plugin ) {
       
   268 		$plugin = (object) $plugin;
       
   269 	}
       
   270 	unset( $plugin );
       
   271 
       
   272 	if ( is_array( $response ) ) {
       
   273 		$new_option->response = $response['plugins'];
       
   274 		$new_option->translations = $response['translations'];
       
   275 	} else {
       
   276 		$new_option->response = array();
       
   277 		$new_option->translations = array();
       
   278 	}
       
   279 
       
   280 	set_site_transient( 'update_plugins', $new_option );
       
   281 }
       
   282 
       
   283 /**
       
   284  * Check theme versions against the latest versions hosted on WordPress.org.
       
   285  *
       
   286  * A list of all themes installed in sent to WP. Checks against the
       
   287  * WordPress server at api.wordpress.org. Will only check if WordPress isn't
       
   288  * installing.
       
   289  *
       
   290  * @package WordPress
       
   291  * @since 2.7.0
       
   292  * @uses $wp_version Used to notify the WordPress version.
       
   293  *
       
   294  * @return mixed Returns null if update is unsupported. Returns false if check is too soon.
       
   295  */
       
   296 function wp_update_themes() {
       
   297 	include ABSPATH . WPINC . '/version.php'; // include an unmodified $wp_version
       
   298 
       
   299 	if ( defined( 'WP_INSTALLING' ) )
       
   300 		return false;
       
   301 
       
   302 	$installed_themes = wp_get_themes();
       
   303 	$translations = wp_get_installed_translations( 'themes' );
       
   304 
       
   305 	$last_update = get_site_transient( 'update_themes' );
       
   306 	if ( ! is_object($last_update) )
       
   307 		$last_update = new stdClass;
       
   308 
       
   309 	$themes = $checked = $request = array();
       
   310 
       
   311 	// Put slug of current theme into request.
       
   312 	$request['active'] = get_option( 'stylesheet' );
       
   313 
       
   314 	foreach ( $installed_themes as $theme ) {
       
   315 		$checked[ $theme->get_stylesheet() ] = $theme->get('Version');
       
   316 
       
   317 		$themes[ $theme->get_stylesheet() ] = array(
       
   318 			'Name'       => $theme->get('Name'),
       
   319 			'Title'      => $theme->get('Name'),
       
   320 			'Version'    => $theme->get('Version'),
       
   321 			'Author'     => $theme->get('Author'),
       
   322 			'Author URI' => $theme->get('AuthorURI'),
       
   323 			'Template'   => $theme->get_template(),
       
   324 			'Stylesheet' => $theme->get_stylesheet(),
       
   325 		);
       
   326 	}
       
   327 
       
   328 	// Check for update on a different schedule, depending on the page.
       
   329 	switch ( current_filter() ) {
       
   330 		case 'upgrader_process_complete' :
       
   331 			$timeout = 0;
       
   332 			break;
       
   333 		case 'load-update-core.php' :
       
   334 			$timeout = MINUTE_IN_SECONDS;
       
   335 			break;
       
   336 		case 'load-themes.php' :
       
   337 		case 'load-update.php' :
       
   338 			$timeout = HOUR_IN_SECONDS;
       
   339 			break;
       
   340 		default :
       
   341 			$timeout = 12 * HOUR_IN_SECONDS;
       
   342 	}
       
   343 
       
   344 	$time_not_changed = isset( $last_update->last_checked ) && $timeout > ( time() - $last_update->last_checked );
       
   345 
       
   346 	if ( $time_not_changed ) {
       
   347 		$theme_changed = false;
       
   348 		foreach ( $checked as $slug => $v ) {
       
   349 			if ( !isset( $last_update->checked[ $slug ] ) || strval($last_update->checked[ $slug ]) !== strval($v) )
       
   350 				$theme_changed = true;
       
   351 		}
       
   352 
       
   353 		if ( isset ( $last_update->response ) && is_array( $last_update->response ) ) {
       
   354 			foreach ( $last_update->response as $slug => $update_details ) {
       
   355 				if ( ! isset($checked[ $slug ]) ) {
       
   356 					$theme_changed = true;
       
   357 					break;
       
   358 				}
       
   359 			}
       
   360 		}
       
   361 
       
   362 		// Bail if we've checked recently and if nothing has changed
       
   363 		if ( ! $theme_changed )
       
   364 			return false;
       
   365 	}
       
   366 
       
   367 	// Update last_checked for current to prevent multiple blocking requests if request hangs
       
   368 	$last_update->last_checked = time();
       
   369 	set_site_transient( 'update_themes', $last_update );
       
   370 
       
   371 	$request['themes'] = $themes;
       
   372 
       
   373 	$locales = array( get_locale() );
       
   374 	/**
       
   375 	 * Filter the locales requested for theme translations.
       
   376 	 *
       
   377 	 * @since 3.7.0
       
   378 	 *
       
   379 	 * @param array $locales Theme locale. Default is current locale of the site.
       
   380 	 */
       
   381 	$locales = apply_filters( 'themes_update_check_locales', $locales );
       
   382 
       
   383 	$options = array(
       
   384 		'timeout' => ( ( defined('DOING_CRON') && DOING_CRON ) ? 30 : 3),
       
   385 		'body' => array(
       
   386 			'themes'       => json_encode( $request ),
       
   387 			'translations' => json_encode( $translations ),
       
   388 			'locale'       => json_encode( $locales ),
       
   389 		),
       
   390 		'user-agent'	=> 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' )
       
   391 	);
       
   392 
       
   393 	$url = $http_url = 'http://api.wordpress.org/themes/update-check/1.1/';
       
   394 	if ( $ssl = wp_http_supports( array( 'ssl' ) ) )
       
   395 		$url = set_url_scheme( $url, 'https' );
       
   396 
       
   397 	$raw_response = wp_remote_post( $url, $options );
       
   398 	if ( $ssl && is_wp_error( $raw_response ) ) {
       
   399 		trigger_error( __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="http://wordpress.org/support/">support forums</a>.' ) . ' ' . '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)', headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE );
       
   400 		$raw_response = wp_remote_post( $http_url, $options );
       
   401 	}
       
   402 
       
   403 	if ( is_wp_error( $raw_response ) || 200 != wp_remote_retrieve_response_code( $raw_response ) )
       
   404 		return false;
       
   405 
       
   406 	$new_update = new stdClass;
       
   407 	$new_update->last_checked = time();
       
   408 	$new_update->checked = $checked;
       
   409 
       
   410 	$response = json_decode( wp_remote_retrieve_body( $raw_response ), true );
       
   411 
       
   412 	if ( is_array( $response ) ) {
       
   413 		$new_update->response     = $response['themes'];
       
   414 		$new_update->translations = $response['translations'];
       
   415 	}
       
   416 
       
   417 	set_site_transient( 'update_themes', $new_update );
       
   418 }
       
   419 
       
   420 /**
       
   421  * Performs WordPress automatic background updates.
       
   422  *
       
   423  * @since 3.7.0
       
   424  */
       
   425 function wp_maybe_auto_update() {
       
   426 	include_once ABSPATH . '/wp-admin/includes/admin.php';
       
   427 	include_once ABSPATH . '/wp-admin/includes/class-wp-upgrader.php';
       
   428 
       
   429 	$upgrader = new WP_Automatic_Updater;
       
   430 	$upgrader->run();
       
   431 }
       
   432 
       
   433 /**
       
   434  * Retrieves a list of all language updates available.
       
   435  *
       
   436  * @since 3.7.0
       
   437  */
       
   438 function wp_get_translation_updates() {
       
   439 	$updates = array();
       
   440 	$transients = array( 'update_core' => 'core', 'update_plugins' => 'plugin', 'update_themes' => 'theme' );
       
   441 	foreach ( $transients as $transient => $type ) {
       
   442 
       
   443 		$transient = get_site_transient( $transient );
       
   444 		if ( empty( $transient->translations ) )
       
   445 			continue;
       
   446 
       
   447 		foreach ( $transient->translations as $translation ) {
       
   448 			$updates[] = (object) $translation;
       
   449 		}
       
   450 	}
       
   451 
       
   452 	return $updates;
       
   453 }
       
   454 
       
   455 /*
       
   456  * Collect counts and UI strings for available updates
       
   457  *
       
   458  * @since 3.3.0
       
   459  *
       
   460  * @return array
       
   461  */
       
   462 function wp_get_update_data() {
       
   463 	$counts = array( 'plugins' => 0, 'themes' => 0, 'wordpress' => 0, 'translations' => 0 );
       
   464 
       
   465 	if ( $plugins = current_user_can( 'update_plugins' ) ) {
       
   466 		$update_plugins = get_site_transient( 'update_plugins' );
       
   467 		if ( ! empty( $update_plugins->response ) )
       
   468 			$counts['plugins'] = count( $update_plugins->response );
       
   469 	}
       
   470 
       
   471 	if ( $themes = current_user_can( 'update_themes' ) ) {
       
   472 		$update_themes = get_site_transient( 'update_themes' );
       
   473 		if ( ! empty( $update_themes->response ) )
       
   474 			$counts['themes'] = count( $update_themes->response );
       
   475 	}
       
   476 
       
   477 	if ( ( $core = current_user_can( 'update_core' ) ) && function_exists( 'get_core_updates' ) ) {
       
   478 		$update_wordpress = get_core_updates( array('dismissed' => false) );
       
   479 		if ( ! empty( $update_wordpress ) && ! in_array( $update_wordpress[0]->response, array('development', 'latest') ) && current_user_can('update_core') )
       
   480 			$counts['wordpress'] = 1;
       
   481 	}
       
   482 
       
   483 	if ( ( $core || $plugins || $themes ) && wp_get_translation_updates() )
       
   484 		$counts['translations'] = 1;
       
   485 
       
   486 	$counts['total'] = $counts['plugins'] + $counts['themes'] + $counts['wordpress'] + $counts['translations'];
       
   487 	$titles = array();
       
   488 	if ( $counts['wordpress'] )
       
   489 		$titles['wordpress'] = sprintf( __( '%d WordPress Update'), $counts['wordpress'] );
       
   490 	if ( $counts['plugins'] )
       
   491 		$titles['plugins'] = sprintf( _n( '%d Plugin Update', '%d Plugin Updates', $counts['plugins'] ), $counts['plugins'] );
       
   492 	if ( $counts['themes'] )
       
   493 		$titles['themes'] = sprintf( _n( '%d Theme Update', '%d Theme Updates', $counts['themes'] ), $counts['themes'] );
       
   494 	if ( $counts['translations'] )
       
   495 		$titles['translations'] = __( 'Translation Updates' );
       
   496 
       
   497 	$update_title = $titles ? esc_attr( implode( ', ', $titles ) ) : '';
       
   498 
       
   499 	$update_data = array( 'counts' => $counts, 'title' => $update_title );
       
   500 	/**
       
   501 	 * Filter the returned array of update data for plugins, themes, and WordPress core.
       
   502 	 *
       
   503 	 * @since 3.5.0
       
   504 	 *
       
   505 	 * @param array $update_data {
       
   506 	 *     Fetched update data.
       
   507 	 *
       
   508 	 *     @type array   $counts       An array of counts for available plugin, theme, and WordPress updates.
       
   509 	 *     @type string  $update_title Titles of available updates.
       
   510 	 * }
       
   511 	 * @param array $titles An array of update counts and UI strings for available updates.
       
   512 	 */
       
   513 	return apply_filters( 'wp_get_update_data', $update_data, $titles );
       
   514 }
       
   515 
       
   516 function _maybe_update_core() {
       
   517 	include ABSPATH . WPINC . '/version.php'; // include an unmodified $wp_version
       
   518 
       
   519 	$current = get_site_transient( 'update_core' );
       
   520 
       
   521 	if ( isset( $current->last_checked ) &&
       
   522 		12 * HOUR_IN_SECONDS > ( time() - $current->last_checked ) &&
       
   523 		isset( $current->version_checked ) &&
       
   524 		$current->version_checked == $wp_version )
       
   525 		return;
       
   526 
       
   527 	wp_version_check();
       
   528 }
       
   529 /**
       
   530  * Check the last time plugins were run before checking plugin versions.
       
   531  *
       
   532  * This might have been backported to WordPress 2.6.1 for performance reasons.
       
   533  * This is used for the wp-admin to check only so often instead of every page
       
   534  * load.
       
   535  *
       
   536  * @since 2.7.0
       
   537  * @access private
       
   538  */
       
   539 function _maybe_update_plugins() {
       
   540 	$current = get_site_transient( 'update_plugins' );
       
   541 	if ( isset( $current->last_checked ) && 12 * HOUR_IN_SECONDS > ( time() - $current->last_checked ) )
       
   542 		return;
       
   543 	wp_update_plugins();
       
   544 }
       
   545 
       
   546 /**
       
   547  * Check themes versions only after a duration of time.
       
   548  *
       
   549  * This is for performance reasons to make sure that on the theme version
       
   550  * checker is not run on every page load.
       
   551  *
       
   552  * @since 2.7.0
       
   553  * @access private
       
   554  */
       
   555 function _maybe_update_themes() {
       
   556 	$current = get_site_transient( 'update_themes' );
       
   557 	if ( isset( $current->last_checked ) && 12 * HOUR_IN_SECONDS > ( time() - $current->last_checked ) )
       
   558 		return;
       
   559 
       
   560 	wp_update_themes();
       
   561 }
       
   562 
       
   563 /**
       
   564  * Schedule core, theme, and plugin update checks.
       
   565  *
       
   566  * @since 3.1.0
       
   567  */
       
   568 function wp_schedule_update_checks() {
       
   569 	if ( !wp_next_scheduled('wp_version_check') && !defined('WP_INSTALLING') )
       
   570 		wp_schedule_event(time(), 'twicedaily', 'wp_version_check');
       
   571 
       
   572 	if ( !wp_next_scheduled('wp_update_plugins') && !defined('WP_INSTALLING') )
       
   573 		wp_schedule_event(time(), 'twicedaily', 'wp_update_plugins');
       
   574 
       
   575 	if ( !wp_next_scheduled('wp_update_themes') && !defined('WP_INSTALLING') )
       
   576 		wp_schedule_event(time(), 'twicedaily', 'wp_update_themes');
       
   577 
       
   578 	if ( ! wp_next_scheduled( 'wp_maybe_auto_update' ) && ! defined( 'WP_INSTALLING' ) ) {
       
   579 		// Schedule auto updates for 7 a.m. and 7 p.m. in the timezone of the site.
       
   580 		$next = strtotime( 'today 7am' );
       
   581 		$now = time();
       
   582 		// Find the next instance of 7 a.m. or 7 p.m., but skip it if it is within 3 hours from now.
       
   583 		while ( ( $now + 3 * HOUR_IN_SECONDS ) > $next ) {
       
   584 			$next += 12 * HOUR_IN_SECONDS;
       
   585 		}
       
   586 		$next = $next - get_option( 'gmt_offset' ) * HOUR_IN_SECONDS;
       
   587 		wp_schedule_event( $next, 'twicedaily', 'wp_maybe_auto_update' );
       
   588 	}
       
   589 }
       
   590 
       
   591 if ( ( ! is_main_site() && ! is_network_admin() ) || ( defined( 'DOING_AJAX' ) && DOING_AJAX ) )
       
   592 	return;
       
   593 
       
   594 add_action( 'admin_init', '_maybe_update_core' );
       
   595 add_action( 'wp_version_check', 'wp_version_check' );
       
   596 add_action( 'upgrader_process_complete', 'wp_version_check', 10, 0 );
       
   597 
       
   598 add_action( 'load-plugins.php', 'wp_update_plugins' );
       
   599 add_action( 'load-update.php', 'wp_update_plugins' );
       
   600 add_action( 'load-update-core.php', 'wp_update_plugins' );
       
   601 add_action( 'admin_init', '_maybe_update_plugins' );
       
   602 add_action( 'wp_update_plugins', 'wp_update_plugins' );
       
   603 add_action( 'upgrader_process_complete', 'wp_update_plugins' );
       
   604 
       
   605 add_action( 'load-themes.php', 'wp_update_themes' );
       
   606 add_action( 'load-update.php', 'wp_update_themes' );
       
   607 add_action( 'load-update-core.php', 'wp_update_themes' );
       
   608 add_action( 'admin_init', '_maybe_update_themes' );
       
   609 add_action( 'wp_update_themes', 'wp_update_themes' );
       
   610 add_action( 'upgrader_process_complete', 'wp_update_themes' );
       
   611 
       
   612 add_action( 'wp_maybe_auto_update', 'wp_maybe_auto_update' );
       
   613 
       
   614 add_action('init', 'wp_schedule_update_checks');