wp/wp-includes/class-wp.php
changeset 16 a86126ab1dd4
parent 13 d255fe9cd479
child 18 be944660c56a
equal deleted inserted replaced
15:3d4e9c994f10 16:a86126ab1dd4
    12 	 * Long list of public query variables.
    12 	 * Long list of public query variables.
    13 	 *
    13 	 *
    14 	 * @since 2.0.0
    14 	 * @since 2.0.0
    15 	 * @var string[]
    15 	 * @var string[]
    16 	 */
    16 	 */
    17 	public $public_query_vars = array( 'm', 'p', 'posts', 'w', 'cat', 'withcomments', 'withoutcomments', 's', 'search', 'exact', 'sentence', 'calendar', 'page', 'paged', 'more', 'tb', 'pb', 'author', 'order', 'orderby', 'year', 'monthnum', 'day', 'hour', 'minute', 'second', 'name', 'category_name', 'tag', 'feed', 'author_name', 'pagename', 'page_id', 'error', 'attachment', 'attachment_id', 'subpost', 'subpost_id', 'preview', 'robots', 'taxonomy', 'term', 'cpage', 'post_type', 'embed' );
    17 	public $public_query_vars = array( 'm', 'p', 'posts', 'w', 'cat', 'withcomments', 'withoutcomments', 's', 'search', 'exact', 'sentence', 'calendar', 'page', 'paged', 'more', 'tb', 'pb', 'author', 'order', 'orderby', 'year', 'monthnum', 'day', 'hour', 'minute', 'second', 'name', 'category_name', 'tag', 'feed', 'author_name', 'pagename', 'page_id', 'error', 'attachment', 'attachment_id', 'subpost', 'subpost_id', 'preview', 'robots', 'favicon', 'taxonomy', 'term', 'cpage', 'post_type', 'embed' );
    18 
    18 
    19 	/**
    19 	/**
    20 	 * Private query variables.
    20 	 * Private query variables.
    21 	 *
    21 	 *
    22 	 * Long list of private query variables.
    22 	 * Long list of private query variables.
    88 	 * @since 2.1.0
    88 	 * @since 2.1.0
    89 	 *
    89 	 *
    90 	 * @param string $qv Query variable name.
    90 	 * @param string $qv Query variable name.
    91 	 */
    91 	 */
    92 	public function add_query_var( $qv ) {
    92 	public function add_query_var( $qv ) {
    93 		if ( ! in_array( $qv, $this->public_query_vars ) ) {
    93 		if ( ! in_array( $qv, $this->public_query_vars, true ) ) {
    94 			$this->public_query_vars[] = $qv;
    94 			$this->public_query_vars[] = $qv;
    95 		}
    95 		}
    96 	}
    96 	}
    97 
    97 
    98 	/**
    98 	/**
   109 	/**
   109 	/**
   110 	 * Set the value of a query variable.
   110 	 * Set the value of a query variable.
   111 	 *
   111 	 *
   112 	 * @since 2.3.0
   112 	 * @since 2.3.0
   113 	 *
   113 	 *
   114 	 * @param string $key Query variable name.
   114 	 * @param string $key   Query variable name.
   115 	 * @param mixed $value Query variable value.
   115 	 * @param mixed  $value Query variable value.
   116 	 */
   116 	 */
   117 	public function set_query_var( $key, $value ) {
   117 	public function set_query_var( $key, $value ) {
   118 		$this->query_vars[ $key ] = $value;
   118 		$this->query_vars[ $key ] = $value;
   119 	}
   119 	}
   120 
   120 
   124 	 * Sets up the query variables based on the request. There are also many
   124 	 * Sets up the query variables based on the request. There are also many
   125 	 * filters and actions that can be used to further manipulate the result.
   125 	 * filters and actions that can be used to further manipulate the result.
   126 	 *
   126 	 *
   127 	 * @since 2.0.0
   127 	 * @since 2.0.0
   128 	 *
   128 	 *
   129 	 * @global WP_Rewrite $wp_rewrite
   129 	 * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
   130 	 *
   130 	 *
   131 	 * @param array|string $extra_query_vars Set the extra query variables.
   131 	 * @param array|string $extra_query_vars Set the extra query variables.
   132 	 */
   132 	 */
   133 	public function parse_request( $extra_query_vars = '' ) {
   133 	public function parse_request( $extra_query_vars = '' ) {
   134 		global $wp_rewrite;
   134 		global $wp_rewrite;
   171 			list( $req_uri ) = explode( '?', $_SERVER['REQUEST_URI'] );
   171 			list( $req_uri ) = explode( '?', $_SERVER['REQUEST_URI'] );
   172 			$self            = $_SERVER['PHP_SELF'];
   172 			$self            = $_SERVER['PHP_SELF'];
   173 			$home_path       = trim( parse_url( home_url(), PHP_URL_PATH ), '/' );
   173 			$home_path       = trim( parse_url( home_url(), PHP_URL_PATH ), '/' );
   174 			$home_path_regex = sprintf( '|^%s|i', preg_quote( $home_path, '|' ) );
   174 			$home_path_regex = sprintf( '|^%s|i', preg_quote( $home_path, '|' ) );
   175 
   175 
   176 			// Trim path info from the end and the leading home path from the
   176 			/*
   177 			// front. For path info requests, this leaves us with the requesting
   177 			 * Trim path info from the end and the leading home path from the front.
   178 			// filename, if any. For 404 requests, this leaves us with the
   178 			 * For path info requests, this leaves us with the requesting filename, if any.
   179 			// requested permalink.
   179 			 * For 404 requests, this leaves us with the requested permalink.
       
   180 			 */
   180 			$req_uri  = str_replace( $pathinfo, '', $req_uri );
   181 			$req_uri  = str_replace( $pathinfo, '', $req_uri );
   181 			$req_uri  = trim( $req_uri, '/' );
   182 			$req_uri  = trim( $req_uri, '/' );
   182 			$req_uri  = preg_replace( $home_path_regex, '', $req_uri );
   183 			$req_uri  = preg_replace( $home_path_regex, '', $req_uri );
   183 			$req_uri  = trim( $req_uri, '/' );
   184 			$req_uri  = trim( $req_uri, '/' );
   184 			$pathinfo = trim( $pathinfo, '/' );
   185 			$pathinfo = trim( $pathinfo, '/' );
   187 			$self     = trim( $self, '/' );
   188 			$self     = trim( $self, '/' );
   188 			$self     = preg_replace( $home_path_regex, '', $self );
   189 			$self     = preg_replace( $home_path_regex, '', $self );
   189 			$self     = trim( $self, '/' );
   190 			$self     = trim( $self, '/' );
   190 
   191 
   191 			// The requested permalink is in $pathinfo for path info requests and
   192 			// The requested permalink is in $pathinfo for path info requests and
   192 			//  $req_uri for other requests.
   193 			// $req_uri for other requests.
   193 			if ( ! empty( $pathinfo ) && ! preg_match( '|^.*' . $wp_rewrite->index . '$|', $pathinfo ) ) {
   194 			if ( ! empty( $pathinfo ) && ! preg_match( '|^.*' . $wp_rewrite->index . '$|', $pathinfo ) ) {
   194 				$requested_path = $pathinfo;
   195 				$requested_path = $pathinfo;
   195 			} else {
   196 			} else {
   196 				// If the request uri is the index, blank it out so that we don't try to match it against a rule.
   197 				// If the request uri is the index, blank it out so that we don't try to match it against a rule.
   197 				if ( $req_uri == $wp_rewrite->index ) {
   198 				if ( $req_uri == $wp_rewrite->index ) {
   204 			$this->request = $requested_path;
   205 			$this->request = $requested_path;
   205 
   206 
   206 			// Look for matches.
   207 			// Look for matches.
   207 			$request_match = $requested_path;
   208 			$request_match = $requested_path;
   208 			if ( empty( $request_match ) ) {
   209 			if ( empty( $request_match ) ) {
   209 				// An empty request could only match against ^$ regex
   210 				// An empty request could only match against ^$ regex.
   210 				if ( isset( $rewrite['$'] ) ) {
   211 				if ( isset( $rewrite['$'] ) ) {
   211 					$this->matched_rule = '$';
   212 					$this->matched_rule = '$';
   212 					$query              = $rewrite['$'];
   213 					$query              = $rewrite['$'];
   213 					$matches            = array( '' );
   214 					$matches            = array( '' );
   214 				}
   215 				}
   272 				$this->did_permalink = false;
   273 				$this->did_permalink = false;
   273 			}
   274 			}
   274 		}
   275 		}
   275 
   276 
   276 		/**
   277 		/**
   277 		 * Filters the query variables whitelist before processing.
   278 		 * Filters the query variables allowed before processing.
   278 		 *
   279 		 *
   279 		 * Allows (publicly allowed) query vars to be added, removed, or changed prior
   280 		 * Allows (publicly allowed) query vars to be added, removed, or changed prior
   280 		 * to executing the query. Needed to allow custom rewrite rules using your own arguments
   281 		 * to executing the query. Needed to allow custom rewrite rules using your own arguments
   281 		 * to work, or any other custom query variables you want to be publicly available.
   282 		 * to work, or any other custom query variables you want to be publicly available.
   282 		 *
   283 		 *
   283 		 * @since 1.5.0
   284 		 * @since 1.5.0
   284 		 *
   285 		 *
   285 		 * @param string[] $public_query_vars The array of whitelisted query variable names.
   286 		 * @param string[] $public_query_vars The array of allowed query variable names.
   286 		 */
   287 		 */
   287 		$this->public_query_vars = apply_filters( 'query_vars', $this->public_query_vars );
   288 		$this->public_query_vars = apply_filters( 'query_vars', $this->public_query_vars );
   288 
   289 
   289 		foreach ( get_post_types( array(), 'objects' ) as $post_type => $t ) {
   290 		foreach ( get_post_types( array(), 'objects' ) as $post_type => $t ) {
   290 			if ( is_post_type_viewable( $t ) && $t->query_var ) {
   291 			if ( is_post_type_viewable( $t ) && $t->query_var ) {
   321 					$this->query_vars['name']      = $this->query_vars[ $wpvar ];
   322 					$this->query_vars['name']      = $this->query_vars[ $wpvar ];
   322 				}
   323 				}
   323 			}
   324 			}
   324 		}
   325 		}
   325 
   326 
   326 		// Convert urldecoded spaces back into +
   327 		// Convert urldecoded spaces back into '+'.
   327 		foreach ( get_taxonomies( array(), 'objects' ) as $taxonomy => $t ) {
   328 		foreach ( get_taxonomies( array(), 'objects' ) as $taxonomy => $t ) {
   328 			if ( $t->query_var && isset( $this->query_vars[ $t->query_var ] ) ) {
   329 			if ( $t->query_var && isset( $this->query_vars[ $t->query_var ] ) ) {
   329 				$this->query_vars[ $t->query_var ] = str_replace( ' ', '+', $this->query_vars[ $t->query_var ] );
   330 				$this->query_vars[ $t->query_var ] = str_replace( ' ', '+', $this->query_vars[ $t->query_var ] );
   330 			}
   331 			}
   331 		}
   332 		}
   341 					unset( $this->query_vars['taxonomy'], $this->query_vars['term'] );
   342 					unset( $this->query_vars['taxonomy'], $this->query_vars['term'] );
   342 				}
   343 				}
   343 			}
   344 			}
   344 		}
   345 		}
   345 
   346 
   346 		// Limit publicly queried post_types to those that are publicly_queryable
   347 		// Limit publicly queried post_types to those that are 'publicly_queryable'.
   347 		if ( isset( $this->query_vars['post_type'] ) ) {
   348 		if ( isset( $this->query_vars['post_type'] ) ) {
   348 			$queryable_post_types = get_post_types( array( 'publicly_queryable' => true ) );
   349 			$queryable_post_types = get_post_types( array( 'publicly_queryable' => true ) );
   349 			if ( ! is_array( $this->query_vars['post_type'] ) ) {
   350 			if ( ! is_array( $this->query_vars['post_type'] ) ) {
   350 				if ( ! in_array( $this->query_vars['post_type'], $queryable_post_types ) ) {
   351 				if ( ! in_array( $this->query_vars['post_type'], $queryable_post_types, true ) ) {
   351 					unset( $this->query_vars['post_type'] );
   352 					unset( $this->query_vars['post_type'] );
   352 				}
   353 				}
   353 			} else {
   354 			} else {
   354 				$this->query_vars['post_type'] = array_intersect( $this->query_vars['post_type'], $queryable_post_types );
   355 				$this->query_vars['post_type'] = array_intersect( $this->query_vars['post_type'], $queryable_post_types );
   355 			}
   356 			}
   401 		$status        = null;
   402 		$status        = null;
   402 		$exit_required = false;
   403 		$exit_required = false;
   403 
   404 
   404 		if ( is_user_logged_in() ) {
   405 		if ( is_user_logged_in() ) {
   405 			$headers = array_merge( $headers, wp_get_nocache_headers() );
   406 			$headers = array_merge( $headers, wp_get_nocache_headers() );
       
   407 		} elseif ( ! empty( $_GET['unapproved'] ) && ! empty( $_GET['moderation-hash'] ) ) {
       
   408 			// Unmoderated comments are only visible for one minute via the moderation hash.
       
   409 			$headers['Expires']       = gmdate( 'D, d M Y H:i:s', time() + MINUTE_IN_SECONDS );
       
   410 			$headers['Cache-Control'] = 'max-age=60, must-revalidate';
   406 		}
   411 		}
   407 		if ( ! empty( $this->query_vars['error'] ) ) {
   412 		if ( ! empty( $this->query_vars['error'] ) ) {
   408 			$status = (int) $this->query_vars['error'];
   413 			$status = (int) $this->query_vars['error'];
   409 			if ( 404 === $status ) {
   414 			if ( 404 === $status ) {
   410 				if ( ! is_user_logged_in() ) {
   415 				if ( ! is_user_logged_in() ) {
   411 					$headers = array_merge( $headers, wp_get_nocache_headers() );
   416 					$headers = array_merge( $headers, wp_get_nocache_headers() );
   412 				}
   417 				}
   413 				$headers['Content-Type'] = get_option( 'html_type' ) . '; charset=' . get_option( 'blog_charset' );
   418 				$headers['Content-Type'] = get_option( 'html_type' ) . '; charset=' . get_option( 'blog_charset' );
   414 			} elseif ( in_array( $status, array( 403, 500, 502, 503 ) ) ) {
   419 			} elseif ( in_array( $status, array( 403, 500, 502, 503 ), true ) ) {
   415 				$exit_required = true;
   420 				$exit_required = true;
   416 			}
   421 			}
   417 		} elseif ( empty( $this->query_vars['feed'] ) ) {
   422 		} elseif ( empty( $this->query_vars['feed'] ) ) {
   418 			$headers['Content-Type'] = get_option( 'html_type' ) . '; charset=' . get_option( 'blog_charset' );
   423 			$headers['Content-Type'] = get_option( 'html_type' ) . '; charset=' . get_option( 'blog_charset' );
   419 		} else {
   424 		} else {
   420 			// Set the correct content type for feeds
   425 			// Set the correct content type for feeds.
   421 			$type = $this->query_vars['feed'];
   426 			$type = $this->query_vars['feed'];
   422 			if ( 'feed' == $this->query_vars['feed'] ) {
   427 			if ( 'feed' === $this->query_vars['feed'] ) {
   423 				$type = get_default_feed();
   428 				$type = get_default_feed();
   424 			}
   429 			}
   425 			$headers['Content-Type'] = feed_content_type( $type ) . '; charset=' . get_option( 'blog_charset' );
   430 			$headers['Content-Type'] = feed_content_type( $type ) . '; charset=' . get_option( 'blog_charset' );
   426 
   431 
   427 			// We're showing a feed, so WP is indeed the only thing that last changed.
   432 			// We're showing a feed, so WP is indeed the only thing that last changed.
   441 			} else {
   446 			} else {
   442 				$wp_last_modified = mysql2date( 'D, d M Y H:i:s', get_lastpostmodified( 'GMT' ), false );
   447 				$wp_last_modified = mysql2date( 'D, d M Y H:i:s', get_lastpostmodified( 'GMT' ), false );
   443 			}
   448 			}
   444 
   449 
   445 			if ( ! $wp_last_modified ) {
   450 			if ( ! $wp_last_modified ) {
   446 				$wp_last_modified = date( 'D, d M Y H:i:s' );
   451 				$wp_last_modified = gmdate( 'D, d M Y H:i:s' );
   447 			}
   452 			}
   448 
   453 
   449 			$wp_last_modified .= ' GMT';
   454 			$wp_last_modified .= ' GMT';
   450 
   455 
   451 			$wp_etag                  = '"' . md5( $wp_last_modified ) . '"';
   456 			$wp_etag                  = '"' . md5( $wp_last_modified ) . '"';
   452 			$headers['Last-Modified'] = $wp_last_modified;
   457 			$headers['Last-Modified'] = $wp_last_modified;
   453 			$headers['ETag']          = $wp_etag;
   458 			$headers['ETag']          = $wp_etag;
   454 
   459 
   455 			// Support for Conditional GET
   460 			// Support for conditional GET.
   456 			if ( isset( $_SERVER['HTTP_IF_NONE_MATCH'] ) ) {
   461 			if ( isset( $_SERVER['HTTP_IF_NONE_MATCH'] ) ) {
   457 				$client_etag = wp_unslash( $_SERVER['HTTP_IF_NONE_MATCH'] );
   462 				$client_etag = wp_unslash( $_SERVER['HTTP_IF_NONE_MATCH'] );
   458 			} else {
   463 			} else {
   459 				$client_etag = false;
   464 				$client_etag = false;
   460 			}
   465 			}
   461 
   466 
   462 			$client_last_modified = empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ? '' : trim( $_SERVER['HTTP_IF_MODIFIED_SINCE'] );
   467 			$client_last_modified = empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ? '' : trim( $_SERVER['HTTP_IF_MODIFIED_SINCE'] );
   463 			// If string is empty, return 0. If not, attempt to parse into a timestamp
   468 			// If string is empty, return 0. If not, attempt to parse into a timestamp.
   464 			$client_modified_timestamp = $client_last_modified ? strtotime( $client_last_modified ) : 0;
   469 			$client_modified_timestamp = $client_last_modified ? strtotime( $client_last_modified ) : 0;
   465 
   470 
   466 			// Make a timestamp for our most recent modification...
   471 			// Make a timestamp for our most recent modification..
   467 			$wp_modified_timestamp = strtotime( $wp_last_modified );
   472 			$wp_modified_timestamp = strtotime( $wp_last_modified );
   468 
   473 
   469 			if ( ( $client_last_modified && $client_etag ) ?
   474 			if ( ( $client_last_modified && $client_etag ) ?
   470 					( ( $client_modified_timestamp >= $wp_modified_timestamp ) && ( $client_etag == $wp_etag ) ) :
   475 					( ( $client_modified_timestamp >= $wp_modified_timestamp ) && ( $client_etag == $wp_etag ) ) :
   471 					( ( $client_modified_timestamp >= $wp_modified_timestamp ) || ( $client_etag == $wp_etag ) ) ) {
   476 					( ( $client_modified_timestamp >= $wp_modified_timestamp ) || ( $client_etag == $wp_etag ) ) ) {
   490 
   495 
   491 		// If Last-Modified is set to false, it should not be sent (no-cache situation).
   496 		// If Last-Modified is set to false, it should not be sent (no-cache situation).
   492 		if ( isset( $headers['Last-Modified'] ) && false === $headers['Last-Modified'] ) {
   497 		if ( isset( $headers['Last-Modified'] ) && false === $headers['Last-Modified'] ) {
   493 			unset( $headers['Last-Modified'] );
   498 			unset( $headers['Last-Modified'] );
   494 
   499 
   495 			// In PHP 5.3+, make sure we are not sending a Last-Modified header.
   500 			if ( ! headers_sent() ) {
   496 			if ( function_exists( 'header_remove' ) ) {
   501 				header_remove( 'Last-Modified' );
   497 				@header_remove( 'Last-Modified' );
   502 			}
   498 			} else {
   503 		}
   499 				// In PHP 5.2, send an empty Last-Modified header, but only as a
   504 
   500 				// last resort to override a header already sent. #WP23021
   505 		if ( ! headers_sent() ) {
   501 				foreach ( headers_list() as $header ) {
   506 			foreach ( (array) $headers as $name => $field_value ) {
   502 					if ( 0 === stripos( $header, 'Last-Modified' ) ) {
   507 				header( "{$name}: {$field_value}" );
   503 						$headers['Last-Modified'] = '';
   508 			}
   504 						break;
       
   505 					}
       
   506 				}
       
   507 			}
       
   508 		}
       
   509 
       
   510 		foreach ( (array) $headers as $name => $field_value ) {
       
   511 			@header( "{$name}: {$field_value}" );
       
   512 		}
   509 		}
   513 
   510 
   514 		if ( $exit_required ) {
   511 		if ( $exit_required ) {
   515 			exit();
   512 			exit;
   516 		}
   513 		}
   517 
   514 
   518 		/**
   515 		/**
   519 		 * Fires once the requested HTTP headers for caching, content type, etc. have been sent.
   516 		 * Fires once the requested HTTP headers for caching, content type, etc. have been sent.
   520 		 *
   517 		 *
   548 		if ( has_filter( 'query_string' ) ) {  // Don't bother filtering and parsing if no plugins are hooked in.
   545 		if ( has_filter( 'query_string' ) ) {  // Don't bother filtering and parsing if no plugins are hooked in.
   549 			/**
   546 			/**
   550 			 * Filters the query string before parsing.
   547 			 * Filters the query string before parsing.
   551 			 *
   548 			 *
   552 			 * @since 1.5.0
   549 			 * @since 1.5.0
   553 			 * @deprecated 2.1.0 Use 'query_vars' or 'request' filters instead.
   550 			 * @deprecated 2.1.0 Use {@see 'query_vars'} or {@see 'request'} filters instead.
   554 			 *
   551 			 *
   555 			 * @param string $query_string The query string to modify.
   552 			 * @param string $query_string The query string to modify.
   556 			 */
   553 			 */
   557 			$this->query_string = apply_filters( 'query_string', $this->query_string );
   554 			$this->query_string = apply_filters_deprecated(
       
   555 				'query_string',
       
   556 				array( $this->query_string ),
       
   557 				'2.1.0',
       
   558 				'query_vars, request'
       
   559 			);
   558 			parse_str( $this->query_string, $this->query_vars );
   560 			parse_str( $this->query_string, $this->query_vars );
   559 		}
   561 		}
   560 	}
   562 	}
   561 
   563 
   562 	/**
   564 	/**
   566 	 * be taken when naming global variables that might interfere with the
   568 	 * be taken when naming global variables that might interfere with the
   567 	 * WordPress environment.
   569 	 * WordPress environment.
   568 	 *
   570 	 *
   569 	 * @since 2.0.0
   571 	 * @since 2.0.0
   570 	 *
   572 	 *
   571 	 * @global WP_Query     $wp_query
   573 	 * @global WP_Query     $wp_query     WordPress Query object.
   572 	 * @global string       $query_string Query string for the loop.
   574 	 * @global string       $query_string Query string for the loop.
   573 	 * @global array        $posts The found posts.
   575 	 * @global array        $posts        The found posts.
   574 	 * @global WP_Post|null $post The current post, if available.
   576 	 * @global WP_Post|null $post         The current post, if available.
   575 	 * @global string       $request The SQL statement for the request.
   577 	 * @global string       $request      The SQL statement for the request.
   576 	 * @global int          $more Only set, if single page or post.
   578 	 * @global int          $more         Only set, if single page or post.
   577 	 * @global int          $single If single page or post. Only set, if single page or post.
   579 	 * @global int          $single       If single page or post. Only set, if single page or post.
   578 	 * @global WP_User      $authordata Only set, if author archive.
   580 	 * @global WP_User      $authordata   Only set, if author archive.
   579 	 */
   581 	 */
   580 	public function register_globals() {
   582 	public function register_globals() {
   581 		global $wp_query;
   583 		global $wp_query;
   582 
   584 
   583 		// Extract updated query vars back into global namespace.
   585 		// Extract updated query vars back into global namespace.
   612 	/**
   614 	/**
   613 	 * Set up the Loop based on the query variables.
   615 	 * Set up the Loop based on the query variables.
   614 	 *
   616 	 *
   615 	 * @since 2.0.0
   617 	 * @since 2.0.0
   616 	 *
   618 	 *
   617 	 * @global WP_Query $wp_the_query
   619 	 * @global WP_Query $wp_the_query WordPress Query object.
   618 	 */
   620 	 */
   619 	public function query_posts() {
   621 	public function query_posts() {
   620 		global $wp_the_query;
   622 		global $wp_the_query;
   621 		$this->build_query_string();
   623 		$this->build_query_string();
   622 		$wp_the_query->query( $this->query_vars );
   624 		$wp_the_query->query( $this->query_vars );
   623 	}
   625 	}
   624 
   626 
   625 	/**
   627 	/**
   626 	 * Set the Headers for 404, if nothing is found for requested URL.
   628 	 * Set the Headers for 404, if nothing is found for requested URL.
   627 	 *
   629 	 *
   628 	 * Issue a 404 if a request doesn't match any posts and doesn't match
   630 	 * Issue a 404 if a request doesn't match any posts and doesn't match any object
   629 	 * any object (e.g. an existing-but-empty category, tag, author) and a 404 was not already
   631 	 * (e.g. an existing-but-empty category, tag, author) and a 404 was not already issued,
   630 	 * issued, and if the request was not a search or the homepage.
   632 	 * and if the request was not a search or the homepage.
   631 	 *
   633 	 *
   632 	 * Otherwise, issue a 200.
   634 	 * Otherwise, issue a 200.
   633 	 *
   635 	 *
   634 	 * This sets headers after posts have been queried. handle_404() really means "handle status."
   636 	 * This sets headers after posts have been queried. handle_404() really means "handle status".
   635 	 * By inspecting the result of querying posts, seemingly successful requests can be switched to
   637 	 * By inspecting the result of querying posts, seemingly successful requests can be switched to
   636 	 * a 404 so that canonical redirection logic can kick in.
   638 	 * a 404 so that canonical redirection logic can kick in.
   637 	 *
   639 	 *
   638 	 * @since 2.0.0
   640 	 * @since 2.0.0
   639 	 *
   641 	 *
   640 	 * @global WP_Query $wp_query
   642 	 * @global WP_Query $wp_query WordPress Query object.
   641 	 */
   643 	 */
   642 	public function handle_404() {
   644 	public function handle_404() {
   643 		global $wp_query;
   645 		global $wp_query;
   644 
   646 
   645 		/**
   647 		/**
   660 		// If we've already issued a 404, bail.
   662 		// If we've already issued a 404, bail.
   661 		if ( is_404() ) {
   663 		if ( is_404() ) {
   662 			return;
   664 			return;
   663 		}
   665 		}
   664 
   666 
   665 		// Never 404 for the admin, robots, or if we found posts.
   667 		$set_404 = true;
   666 		if ( is_admin() || is_robots() || $wp_query->posts ) {
   668 
   667 
   669 		// Never 404 for the admin, robots, or favicon.
   668 			$success = true;
   670 		if ( is_admin() || is_robots() || is_favicon() ) {
       
   671 			$set_404 = false;
       
   672 
       
   673 			// If posts were found, check for paged content.
       
   674 		} elseif ( $wp_query->posts ) {
       
   675 			$content_found = true;
       
   676 
   669 			if ( is_singular() ) {
   677 			if ( is_singular() ) {
   670 				$p = false;
   678 				$post = isset( $wp_query->post ) ? $wp_query->post : null;
   671 
       
   672 				if ( $wp_query->post instanceof WP_Post ) {
       
   673 					$p = clone $wp_query->post;
       
   674 				}
       
   675 
   679 
   676 				// Only set X-Pingback for single posts that allow pings.
   680 				// Only set X-Pingback for single posts that allow pings.
   677 				if ( $p && pings_open( $p ) ) {
   681 				if ( $post && pings_open( $post ) && ! headers_sent() ) {
   678 					@header( 'X-Pingback: ' . get_bloginfo( 'pingback_url', 'display' ) );
   682 					header( 'X-Pingback: ' . get_bloginfo( 'pingback_url', 'display' ) );
   679 				}
   683 				}
   680 
   684 
   681 				// check for paged content that exceeds the max number of pages
   685 				// Check for paged content that exceeds the max number of pages.
   682 				$next = '<!--nextpage-->';
   686 				$next = '<!--nextpage-->';
   683 				if ( $p && false !== strpos( $p->post_content, $next ) && ! empty( $this->query_vars['page'] ) ) {
   687 				if ( $post && ! empty( $this->query_vars['page'] ) ) {
   684 					$page    = trim( $this->query_vars['page'], '/' );
   688 					// Check if content is actually intended to be paged.
   685 					$success = (int) $page <= ( substr_count( $p->post_content, $next ) + 1 );
   689 					if ( false !== strpos( $post->post_content, $next ) ) {
   686 				}
   690 						$page          = trim( $this->query_vars['page'], '/' );
   687 			}
   691 						$content_found = (int) $page <= ( substr_count( $post->post_content, $next ) + 1 );
   688 
   692 					} else {
   689 			if ( $success ) {
   693 						$content_found = false;
   690 				status_header( 200 );
   694 					}
   691 				return;
   695 				}
   692 			}
   696 			}
   693 		}
   697 
   694 
   698 			// The posts page does not support the <!--nextpage--> pagination.
   695 		// We will 404 for paged queries, as no posts were found.
   699 			if ( $wp_query->is_posts_page && ! empty( $this->query_vars['page'] ) ) {
   696 		if ( ! is_paged() ) {
   700 				$content_found = false;
       
   701 			}
       
   702 
       
   703 			if ( $content_found ) {
       
   704 				$set_404 = false;
       
   705 			}
       
   706 
       
   707 			// We will 404 for paged queries, as no posts were found.
       
   708 		} elseif ( ! is_paged() ) {
       
   709 			$author = get_query_var( 'author' );
   697 
   710 
   698 			// Don't 404 for authors without posts as long as they matched an author on this site.
   711 			// Don't 404 for authors without posts as long as they matched an author on this site.
   699 			$author = get_query_var( 'author' );
   712 			if ( is_author() && is_numeric( $author ) && $author > 0 && is_user_member_of_blog( $author )
   700 			if ( is_author() && is_numeric( $author ) && $author > 0 && is_user_member_of_blog( $author ) ) {
   713 				// Don't 404 for these queries if they matched an object.
   701 				status_header( 200 );
   714 				|| ( is_tag() || is_category() || is_tax() || is_post_type_archive() ) && get_queried_object()
   702 				return;
   715 				// Don't 404 for these queries either.
   703 			}
   716 				|| is_home() || is_search() || is_feed()
   704 
   717 			) {
   705 			// Don't 404 for these queries if they matched an object.
   718 				$set_404 = false;
   706 			if ( ( is_tag() || is_category() || is_tax() || is_post_type_archive() ) && get_queried_object() ) {
   719 			}
   707 				status_header( 200 );
   720 		}
   708 				return;
   721 
   709 			}
   722 		if ( $set_404 ) {
   710 
   723 			// Guess it's time to 404.
   711 			// Don't 404 for these queries either.
   724 			$wp_query->set_404();
   712 			if ( is_home() || is_search() || is_feed() ) {
   725 			status_header( 404 );
   713 				status_header( 200 );
   726 			nocache_headers();
   714 				return;
   727 		} else {
   715 			}
   728 			status_header( 200 );
   716 		}
   729 		}
   717 
       
   718 		// Guess it's time to 404.
       
   719 		$wp_query->set_404();
       
   720 		status_header( 404 );
       
   721 		nocache_headers();
       
   722 	}
   730 	}
   723 
   731 
   724 	/**
   732 	/**
   725 	 * Sets up all of the variables required by the WordPress environment.
   733 	 * Sets up all of the variables required by the WordPress environment.
   726 	 *
   734 	 *