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943e956379
Previously, the `Last-Modified` header of comments feed was using the date/time of the last comment. This behavior was breaking caching and causing feed readers to believe there is no new content even when there might be new posts. This commit changes this behavior to use the newest date from both `get_lastcommentmodified()` and `get_lastpostmodified()` functions instead of only using the result from `get_lastcommentmodified()`. Props xiven, mauteri, costdev, audrasjb. Fixes #47968. Built from https://develop.svn.wordpress.org/trunk@53233 git-svn-id: http://core.svn.wordpress.org/trunk@52822 1a063a9b-81f0-0310-95a4-ce76da25c4cd
790 lines
25 KiB
PHP
790 lines
25 KiB
PHP
<?php
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/**
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* WordPress environment setup class.
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*
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* @package WordPress
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* @since 2.0.0
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*/
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class WP {
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/**
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* Public query variables.
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*
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* Long list of public query variables.
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*
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* @since 2.0.0
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* @var string[]
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*/
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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' );
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/**
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* Private query variables.
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*
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* Long list of private query variables.
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*
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* @since 2.0.0
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* @var string[]
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*/
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public $private_query_vars = array( 'offset', 'posts_per_page', 'posts_per_archive_page', 'showposts', 'nopaging', 'post_type', 'post_status', 'category__in', 'category__not_in', 'category__and', 'tag__in', 'tag__not_in', 'tag__and', 'tag_slug__in', 'tag_slug__and', 'tag_id', 'post_mime_type', 'perm', 'comments_per_page', 'post__in', 'post__not_in', 'post_parent', 'post_parent__in', 'post_parent__not_in', 'title', 'fields' );
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/**
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* Extra query variables set by the user.
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*
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* @since 2.1.0
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* @var array
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*/
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public $extra_query_vars = array();
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/**
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* Query variables for setting up the WordPress Query Loop.
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*
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* @since 2.0.0
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* @var array
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*/
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public $query_vars = array();
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/**
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* String parsed to set the query variables.
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*
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* @since 2.0.0
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* @var string
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*/
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public $query_string = '';
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/**
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* The request path, e.g. 2015/05/06.
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*
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* @since 2.0.0
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* @var string
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*/
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public $request = '';
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/**
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* Rewrite rule the request matched.
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*
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* @since 2.0.0
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* @var string
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*/
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public $matched_rule = '';
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/**
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* Rewrite query the request matched.
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*
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* @since 2.0.0
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* @var string
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*/
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public $matched_query = '';
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/**
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* Whether already did the permalink.
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*
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* @since 2.0.0
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* @var bool
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*/
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public $did_permalink = false;
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/**
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* Adds a query variable to the list of public query variables.
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*
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* @since 2.1.0
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*
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* @param string $qv Query variable name.
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*/
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public function add_query_var( $qv ) {
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if ( ! in_array( $qv, $this->public_query_vars, true ) ) {
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$this->public_query_vars[] = $qv;
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}
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}
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/**
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* Removes a query variable from a list of public query variables.
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*
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* @since 4.5.0
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*
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* @param string $name Query variable name.
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*/
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public function remove_query_var( $name ) {
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$this->public_query_vars = array_diff( $this->public_query_vars, array( $name ) );
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}
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/**
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* Sets the value of a query variable.
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*
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* @since 2.3.0
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*
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* @param string $key Query variable name.
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* @param mixed $value Query variable value.
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*/
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public function set_query_var( $key, $value ) {
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$this->query_vars[ $key ] = $value;
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}
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/**
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* Parses the request to find the correct WordPress query.
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*
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* Sets up the query variables based on the request. There are also many
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* filters and actions that can be used to further manipulate the result.
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*
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* @since 2.0.0
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* @since 6.0.0 A return value was added.
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*
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* @global WP_Rewrite $wp_rewrite WordPress rewrite component.
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*
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* @param array|string $extra_query_vars Set the extra query variables.
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* @return bool Whether the request was parsed.
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*/
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public function parse_request( $extra_query_vars = '' ) {
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global $wp_rewrite;
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/**
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* Filters whether to parse the request.
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*
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* @since 3.5.0
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*
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* @param bool $bool Whether or not to parse the request. Default true.
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* @param WP $wp Current WordPress environment instance.
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* @param array|string $extra_query_vars Extra passed query variables.
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*/
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if ( ! apply_filters( 'do_parse_request', true, $this, $extra_query_vars ) ) {
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return false;
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}
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$this->query_vars = array();
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$post_type_query_vars = array();
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if ( is_array( $extra_query_vars ) ) {
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$this->extra_query_vars = & $extra_query_vars;
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} elseif ( ! empty( $extra_query_vars ) ) {
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parse_str( $extra_query_vars, $this->extra_query_vars );
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}
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// Process PATH_INFO, REQUEST_URI, and 404 for permalinks.
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// Fetch the rewrite rules.
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$rewrite = $wp_rewrite->wp_rewrite_rules();
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if ( ! empty( $rewrite ) ) {
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// If we match a rewrite rule, this will be cleared.
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$error = '404';
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$this->did_permalink = true;
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$pathinfo = isset( $_SERVER['PATH_INFO'] ) ? $_SERVER['PATH_INFO'] : '';
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list( $pathinfo ) = explode( '?', $pathinfo );
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$pathinfo = str_replace( '%', '%25', $pathinfo );
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list( $req_uri ) = explode( '?', $_SERVER['REQUEST_URI'] );
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$self = $_SERVER['PHP_SELF'];
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$home_path = parse_url( home_url(), PHP_URL_PATH );
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$home_path_regex = '';
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if ( is_string( $home_path ) && '' !== $home_path ) {
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$home_path = trim( $home_path, '/' );
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$home_path_regex = sprintf( '|^%s|i', preg_quote( $home_path, '|' ) );
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}
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/*
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* Trim path info from the end and the leading home path from the front.
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* For path info requests, this leaves us with the requesting filename, if any.
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* For 404 requests, this leaves us with the requested permalink.
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*/
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$req_uri = str_replace( $pathinfo, '', $req_uri );
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$req_uri = trim( $req_uri, '/' );
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$pathinfo = trim( $pathinfo, '/' );
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$self = trim( $self, '/' );
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if ( ! empty( $home_path_regex ) ) {
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$req_uri = preg_replace( $home_path_regex, '', $req_uri );
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$req_uri = trim( $req_uri, '/' );
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$pathinfo = preg_replace( $home_path_regex, '', $pathinfo );
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$pathinfo = trim( $pathinfo, '/' );
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$self = preg_replace( $home_path_regex, '', $self );
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$self = trim( $self, '/' );
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}
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// The requested permalink is in $pathinfo for path info requests and
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// $req_uri for other requests.
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if ( ! empty( $pathinfo ) && ! preg_match( '|^.*' . $wp_rewrite->index . '$|', $pathinfo ) ) {
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$requested_path = $pathinfo;
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} else {
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// If the request uri is the index, blank it out so that we don't try to match it against a rule.
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if ( $req_uri == $wp_rewrite->index ) {
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$req_uri = '';
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}
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$requested_path = $req_uri;
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}
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$requested_file = $req_uri;
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$this->request = $requested_path;
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// Look for matches.
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$request_match = $requested_path;
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if ( empty( $request_match ) ) {
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// An empty request could only match against ^$ regex.
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if ( isset( $rewrite['$'] ) ) {
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$this->matched_rule = '$';
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$query = $rewrite['$'];
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$matches = array( '' );
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}
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} else {
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foreach ( (array) $rewrite as $match => $query ) {
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// If the requested file is the anchor of the match, prepend it to the path info.
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if ( ! empty( $requested_file ) && strpos( $match, $requested_file ) === 0 && $requested_file != $requested_path ) {
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$request_match = $requested_file . '/' . $requested_path;
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}
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if ( preg_match( "#^$match#", $request_match, $matches ) ||
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preg_match( "#^$match#", urldecode( $request_match ), $matches ) ) {
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if ( $wp_rewrite->use_verbose_page_rules && preg_match( '/pagename=\$matches\[([0-9]+)\]/', $query, $varmatch ) ) {
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// This is a verbose page match, let's check to be sure about it.
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$page = get_page_by_path( $matches[ $varmatch[1] ] );
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if ( ! $page ) {
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continue;
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}
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$post_status_obj = get_post_status_object( $page->post_status );
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if ( ! $post_status_obj->public && ! $post_status_obj->protected
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&& ! $post_status_obj->private && $post_status_obj->exclude_from_search ) {
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continue;
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}
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}
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// Got a match.
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$this->matched_rule = $match;
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break;
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}
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}
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}
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if ( ! empty( $this->matched_rule ) ) {
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// Trim the query of everything up to the '?'.
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$query = preg_replace( '!^.+\?!', '', $query );
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// Substitute the substring matches into the query.
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$query = addslashes( WP_MatchesMapRegex::apply( $query, $matches ) );
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$this->matched_query = $query;
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// Parse the query.
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parse_str( $query, $perma_query_vars );
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// If we're processing a 404 request, clear the error var since we found something.
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if ( '404' == $error ) {
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unset( $error, $_GET['error'] );
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}
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}
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// If req_uri is empty or if it is a request for ourself, unset error.
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if ( empty( $requested_path ) || $requested_file == $self || strpos( $_SERVER['PHP_SELF'], 'wp-admin/' ) !== false ) {
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unset( $error, $_GET['error'] );
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if ( isset( $perma_query_vars ) && strpos( $_SERVER['PHP_SELF'], 'wp-admin/' ) !== false ) {
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unset( $perma_query_vars );
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}
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$this->did_permalink = false;
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}
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}
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/**
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* Filters the query variables allowed before processing.
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*
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* Allows (publicly allowed) query vars to be added, removed, or changed prior
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* to executing the query. Needed to allow custom rewrite rules using your own arguments
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* to work, or any other custom query variables you want to be publicly available.
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*
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* @since 1.5.0
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*
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* @param string[] $public_query_vars The array of allowed query variable names.
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*/
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$this->public_query_vars = apply_filters( 'query_vars', $this->public_query_vars );
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foreach ( get_post_types( array(), 'objects' ) as $post_type => $t ) {
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if ( is_post_type_viewable( $t ) && $t->query_var ) {
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$post_type_query_vars[ $t->query_var ] = $post_type;
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}
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}
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foreach ( $this->public_query_vars as $wpvar ) {
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if ( isset( $this->extra_query_vars[ $wpvar ] ) ) {
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$this->query_vars[ $wpvar ] = $this->extra_query_vars[ $wpvar ];
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} elseif ( isset( $_GET[ $wpvar ] ) && isset( $_POST[ $wpvar ] ) && $_GET[ $wpvar ] !== $_POST[ $wpvar ] ) {
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wp_die( __( 'A variable mismatch has been detected.' ), __( 'Sorry, you are not allowed to view this item.' ), 400 );
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} elseif ( isset( $_POST[ $wpvar ] ) ) {
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$this->query_vars[ $wpvar ] = $_POST[ $wpvar ];
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} elseif ( isset( $_GET[ $wpvar ] ) ) {
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$this->query_vars[ $wpvar ] = $_GET[ $wpvar ];
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} elseif ( isset( $perma_query_vars[ $wpvar ] ) ) {
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$this->query_vars[ $wpvar ] = $perma_query_vars[ $wpvar ];
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}
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if ( ! empty( $this->query_vars[ $wpvar ] ) ) {
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if ( ! is_array( $this->query_vars[ $wpvar ] ) ) {
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$this->query_vars[ $wpvar ] = (string) $this->query_vars[ $wpvar ];
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} else {
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foreach ( $this->query_vars[ $wpvar ] as $vkey => $v ) {
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if ( is_scalar( $v ) ) {
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$this->query_vars[ $wpvar ][ $vkey ] = (string) $v;
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}
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}
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}
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if ( isset( $post_type_query_vars[ $wpvar ] ) ) {
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$this->query_vars['post_type'] = $post_type_query_vars[ $wpvar ];
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$this->query_vars['name'] = $this->query_vars[ $wpvar ];
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}
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}
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}
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// Convert urldecoded spaces back into '+'.
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foreach ( get_taxonomies( array(), 'objects' ) as $taxonomy => $t ) {
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if ( $t->query_var && isset( $this->query_vars[ $t->query_var ] ) ) {
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$this->query_vars[ $t->query_var ] = str_replace( ' ', '+', $this->query_vars[ $t->query_var ] );
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}
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}
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// Don't allow non-publicly queryable taxonomies to be queried from the front end.
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if ( ! is_admin() ) {
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foreach ( get_taxonomies( array( 'publicly_queryable' => false ), 'objects' ) as $taxonomy => $t ) {
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/*
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* Disallow when set to the 'taxonomy' query var.
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* Non-publicly queryable taxonomies cannot register custom query vars. See register_taxonomy().
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*/
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if ( isset( $this->query_vars['taxonomy'] ) && $taxonomy === $this->query_vars['taxonomy'] ) {
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unset( $this->query_vars['taxonomy'], $this->query_vars['term'] );
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}
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}
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}
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// Limit publicly queried post_types to those that are 'publicly_queryable'.
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if ( isset( $this->query_vars['post_type'] ) ) {
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$queryable_post_types = get_post_types( array( 'publicly_queryable' => true ) );
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if ( ! is_array( $this->query_vars['post_type'] ) ) {
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if ( ! in_array( $this->query_vars['post_type'], $queryable_post_types, true ) ) {
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unset( $this->query_vars['post_type'] );
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}
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} else {
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$this->query_vars['post_type'] = array_intersect( $this->query_vars['post_type'], $queryable_post_types );
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}
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}
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// Resolve conflicts between posts with numeric slugs and date archive queries.
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$this->query_vars = wp_resolve_numeric_slug_conflicts( $this->query_vars );
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foreach ( (array) $this->private_query_vars as $var ) {
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if ( isset( $this->extra_query_vars[ $var ] ) ) {
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$this->query_vars[ $var ] = $this->extra_query_vars[ $var ];
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}
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}
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if ( isset( $error ) ) {
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$this->query_vars['error'] = $error;
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}
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/**
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* Filters the array of parsed query variables.
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*
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* @since 2.1.0
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*
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* @param array $query_vars The array of requested query variables.
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*/
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$this->query_vars = apply_filters( 'request', $this->query_vars );
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/**
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* Fires once all query variables for the current request have been parsed.
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*
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* @since 2.1.0
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*
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* @param WP $wp Current WordPress environment instance (passed by reference).
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*/
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do_action_ref_array( 'parse_request', array( &$this ) );
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return true;
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}
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/**
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* Sends additional HTTP headers for caching, content type, etc.
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*
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* Sets the Content-Type header. Sets the 'error' status (if passed) and optionally exits.
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* If showing a feed, it will also send Last-Modified, ETag, and 304 status if needed.
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*
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* @since 2.0.0
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* @since 4.4.0 `X-Pingback` header is added conditionally after posts have been queried in handle_404().
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*/
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public function send_headers() {
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$headers = array();
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$status = null;
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$exit_required = false;
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$date_format = 'D, d M Y H:i:s';
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if ( is_user_logged_in() ) {
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$headers = array_merge( $headers, wp_get_nocache_headers() );
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} elseif ( ! empty( $_GET['unapproved'] ) && ! empty( $_GET['moderation-hash'] ) ) {
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// Unmoderated comments are only visible for 10 minutes via the moderation hash.
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$expires = 10 * MINUTE_IN_SECONDS;
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$headers['Expires'] = gmdate( $date_format, time() + $expires );
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$headers['Cache-Control'] = sprintf(
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'max-age=%d, must-revalidate',
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$expires
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);
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}
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if ( ! empty( $this->query_vars['error'] ) ) {
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$status = (int) $this->query_vars['error'];
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if ( 404 === $status ) {
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if ( ! is_user_logged_in() ) {
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$headers = array_merge( $headers, wp_get_nocache_headers() );
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}
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$headers['Content-Type'] = get_option( 'html_type' ) . '; charset=' . get_option( 'blog_charset' );
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} elseif ( in_array( $status, array( 403, 500, 502, 503 ), true ) ) {
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$exit_required = true;
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}
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} elseif ( empty( $this->query_vars['feed'] ) ) {
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$headers['Content-Type'] = get_option( 'html_type' ) . '; charset=' . get_option( 'blog_charset' );
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} else {
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// Set the correct content type for feeds.
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$type = $this->query_vars['feed'];
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if ( 'feed' === $this->query_vars['feed'] ) {
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$type = get_default_feed();
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}
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$headers['Content-Type'] = feed_content_type( $type ) . '; charset=' . get_option( 'blog_charset' );
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// We're showing a feed, so WP is indeed the only thing that last changed.
|
|
if ( ! empty( $this->query_vars['withcomments'] )
|
|
|| false !== strpos( $this->query_vars['feed'], 'comments-' )
|
|
|| ( empty( $this->query_vars['withoutcomments'] )
|
|
&& ( ! empty( $this->query_vars['p'] )
|
|
|| ! empty( $this->query_vars['name'] )
|
|
|| ! empty( $this->query_vars['page_id'] )
|
|
|| ! empty( $this->query_vars['pagename'] )
|
|
|| ! empty( $this->query_vars['attachment'] )
|
|
|| ! empty( $this->query_vars['attachment_id'] )
|
|
)
|
|
)
|
|
) {
|
|
$wp_last_modified_post = mysql2date( $date_format, get_lastpostmodified( 'GMT' ), false );
|
|
$wp_last_modified_comment = mysql2date( $date_format, get_lastcommentmodified( 'GMT' ), false );
|
|
if ( strtotime( $wp_last_modified_post ) > strtotime( $wp_last_modified_comment ) ) {
|
|
$wp_last_modified = $wp_last_modified_post;
|
|
} else {
|
|
$wp_last_modified = $wp_last_modified_comment;
|
|
}
|
|
} else {
|
|
$wp_last_modified = mysql2date( $date_format, get_lastpostmodified( 'GMT' ), false );
|
|
}
|
|
|
|
if ( ! $wp_last_modified ) {
|
|
$wp_last_modified = gmdate( $date_format );
|
|
}
|
|
|
|
$wp_last_modified .= ' GMT';
|
|
|
|
$wp_etag = '"' . md5( $wp_last_modified ) . '"';
|
|
$headers['Last-Modified'] = $wp_last_modified;
|
|
$headers['ETag'] = $wp_etag;
|
|
|
|
// Support for conditional GET.
|
|
if ( isset( $_SERVER['HTTP_IF_NONE_MATCH'] ) ) {
|
|
$client_etag = wp_unslash( $_SERVER['HTTP_IF_NONE_MATCH'] );
|
|
} else {
|
|
$client_etag = false;
|
|
}
|
|
|
|
$client_last_modified = empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ? '' : trim( $_SERVER['HTTP_IF_MODIFIED_SINCE'] );
|
|
// If string is empty, return 0. If not, attempt to parse into a timestamp.
|
|
$client_modified_timestamp = $client_last_modified ? strtotime( $client_last_modified ) : 0;
|
|
|
|
// Make a timestamp for our most recent modification..
|
|
$wp_modified_timestamp = strtotime( $wp_last_modified );
|
|
|
|
if ( ( $client_last_modified && $client_etag ) ?
|
|
( ( $client_modified_timestamp >= $wp_modified_timestamp ) && ( $client_etag == $wp_etag ) ) :
|
|
( ( $client_modified_timestamp >= $wp_modified_timestamp ) || ( $client_etag == $wp_etag ) ) ) {
|
|
$status = 304;
|
|
$exit_required = true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Filters the HTTP headers before they're sent to the browser.
|
|
*
|
|
* @since 2.8.0
|
|
*
|
|
* @param string[] $headers Associative array of headers to be sent.
|
|
* @param WP $wp Current WordPress environment instance.
|
|
*/
|
|
$headers = apply_filters( 'wp_headers', $headers, $this );
|
|
|
|
if ( ! empty( $status ) ) {
|
|
status_header( $status );
|
|
}
|
|
|
|
// If Last-Modified is set to false, it should not be sent (no-cache situation).
|
|
if ( isset( $headers['Last-Modified'] ) && false === $headers['Last-Modified'] ) {
|
|
unset( $headers['Last-Modified'] );
|
|
|
|
if ( ! headers_sent() ) {
|
|
header_remove( 'Last-Modified' );
|
|
}
|
|
}
|
|
|
|
if ( ! headers_sent() ) {
|
|
foreach ( (array) $headers as $name => $field_value ) {
|
|
header( "{$name}: {$field_value}" );
|
|
}
|
|
}
|
|
|
|
if ( $exit_required ) {
|
|
exit;
|
|
}
|
|
|
|
/**
|
|
* Fires once the requested HTTP headers for caching, content type, etc. have been sent.
|
|
*
|
|
* @since 2.1.0
|
|
*
|
|
* @param WP $wp Current WordPress environment instance (passed by reference).
|
|
*/
|
|
do_action_ref_array( 'send_headers', array( &$this ) );
|
|
}
|
|
|
|
/**
|
|
* Sets the query string property based off of the query variable property.
|
|
*
|
|
* The {@see 'query_string'} filter is deprecated, but still works. Plugins should
|
|
* use the {@see 'request'} filter instead.
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
public function build_query_string() {
|
|
$this->query_string = '';
|
|
foreach ( (array) array_keys( $this->query_vars ) as $wpvar ) {
|
|
if ( '' != $this->query_vars[ $wpvar ] ) {
|
|
$this->query_string .= ( strlen( $this->query_string ) < 1 ) ? '' : '&';
|
|
if ( ! is_scalar( $this->query_vars[ $wpvar ] ) ) { // Discard non-scalars.
|
|
continue;
|
|
}
|
|
$this->query_string .= $wpvar . '=' . rawurlencode( $this->query_vars[ $wpvar ] );
|
|
}
|
|
}
|
|
|
|
if ( has_filter( 'query_string' ) ) { // Don't bother filtering and parsing if no plugins are hooked in.
|
|
/**
|
|
* Filters the query string before parsing.
|
|
*
|
|
* @since 1.5.0
|
|
* @deprecated 2.1.0 Use {@see 'query_vars'} or {@see 'request'} filters instead.
|
|
*
|
|
* @param string $query_string The query string to modify.
|
|
*/
|
|
$this->query_string = apply_filters_deprecated(
|
|
'query_string',
|
|
array( $this->query_string ),
|
|
'2.1.0',
|
|
'query_vars, request'
|
|
);
|
|
parse_str( $this->query_string, $this->query_vars );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Set up the WordPress Globals.
|
|
*
|
|
* The query_vars property will be extracted to the GLOBALS. So care should
|
|
* be taken when naming global variables that might interfere with the
|
|
* WordPress environment.
|
|
*
|
|
* @since 2.0.0
|
|
*
|
|
* @global WP_Query $wp_query WordPress Query object.
|
|
* @global string $query_string Query string for the loop.
|
|
* @global array $posts The found posts.
|
|
* @global WP_Post|null $post The current post, if available.
|
|
* @global string $request The SQL statement for the request.
|
|
* @global int $more Only set, if single page or post.
|
|
* @global int $single If single page or post. Only set, if single page or post.
|
|
* @global WP_User $authordata Only set, if author archive.
|
|
*/
|
|
public function register_globals() {
|
|
global $wp_query;
|
|
|
|
// Extract updated query vars back into global namespace.
|
|
foreach ( (array) $wp_query->query_vars as $key => $value ) {
|
|
$GLOBALS[ $key ] = $value;
|
|
}
|
|
|
|
$GLOBALS['query_string'] = $this->query_string;
|
|
$GLOBALS['posts'] = & $wp_query->posts;
|
|
$GLOBALS['post'] = isset( $wp_query->post ) ? $wp_query->post : null;
|
|
$GLOBALS['request'] = $wp_query->request;
|
|
|
|
if ( $wp_query->is_single() || $wp_query->is_page() ) {
|
|
$GLOBALS['more'] = 1;
|
|
$GLOBALS['single'] = 1;
|
|
}
|
|
|
|
if ( $wp_query->is_author() ) {
|
|
$GLOBALS['authordata'] = get_userdata( get_queried_object_id() );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Set up the current user.
|
|
*
|
|
* @since 2.0.0
|
|
*/
|
|
public function init() {
|
|
wp_get_current_user();
|
|
}
|
|
|
|
/**
|
|
* Set up the Loop based on the query variables.
|
|
*
|
|
* @since 2.0.0
|
|
*
|
|
* @global WP_Query $wp_the_query WordPress Query object.
|
|
*/
|
|
public function query_posts() {
|
|
global $wp_the_query;
|
|
$this->build_query_string();
|
|
$wp_the_query->query( $this->query_vars );
|
|
}
|
|
|
|
/**
|
|
* Set the Headers for 404, if nothing is found for requested URL.
|
|
*
|
|
* Issue a 404 if a request doesn't match any posts and doesn't match any object
|
|
* (e.g. an existing-but-empty category, tag, author) and a 404 was not already issued,
|
|
* and if the request was not a search or the homepage.
|
|
*
|
|
* Otherwise, issue a 200.
|
|
*
|
|
* This sets headers after posts have been queried. handle_404() really means "handle status".
|
|
* By inspecting the result of querying posts, seemingly successful requests can be switched to
|
|
* a 404 so that canonical redirection logic can kick in.
|
|
*
|
|
* @since 2.0.0
|
|
*
|
|
* @global WP_Query $wp_query WordPress Query object.
|
|
*/
|
|
public function handle_404() {
|
|
global $wp_query;
|
|
|
|
/**
|
|
* Filters whether to short-circuit default header status handling.
|
|
*
|
|
* Returning a non-false value from the filter will short-circuit the handling
|
|
* and return early.
|
|
*
|
|
* @since 4.5.0
|
|
*
|
|
* @param bool $preempt Whether to short-circuit default header status handling. Default false.
|
|
* @param WP_Query $wp_query WordPress Query object.
|
|
*/
|
|
if ( false !== apply_filters( 'pre_handle_404', false, $wp_query ) ) {
|
|
return;
|
|
}
|
|
|
|
// If we've already issued a 404, bail.
|
|
if ( is_404() ) {
|
|
return;
|
|
}
|
|
|
|
$set_404 = true;
|
|
|
|
// Never 404 for the admin, robots, or favicon.
|
|
if ( is_admin() || is_robots() || is_favicon() ) {
|
|
$set_404 = false;
|
|
|
|
// If posts were found, check for paged content.
|
|
} elseif ( $wp_query->posts ) {
|
|
$content_found = true;
|
|
|
|
if ( is_singular() ) {
|
|
$post = isset( $wp_query->post ) ? $wp_query->post : null;
|
|
|
|
// Only set X-Pingback for single posts that allow pings.
|
|
if ( $post && pings_open( $post ) && ! headers_sent() ) {
|
|
header( 'X-Pingback: ' . get_bloginfo( 'pingback_url', 'display' ) );
|
|
}
|
|
|
|
// Check for paged content that exceeds the max number of pages.
|
|
$next = '<!--nextpage-->';
|
|
if ( $post && ! empty( $this->query_vars['page'] ) ) {
|
|
// Check if content is actually intended to be paged.
|
|
if ( false !== strpos( $post->post_content, $next ) ) {
|
|
$page = trim( $this->query_vars['page'], '/' );
|
|
$content_found = (int) $page <= ( substr_count( $post->post_content, $next ) + 1 );
|
|
} else {
|
|
$content_found = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
// The posts page does not support the <!--nextpage--> pagination.
|
|
if ( $wp_query->is_posts_page && ! empty( $this->query_vars['page'] ) ) {
|
|
$content_found = false;
|
|
}
|
|
|
|
if ( $content_found ) {
|
|
$set_404 = false;
|
|
}
|
|
|
|
// We will 404 for paged queries, as no posts were found.
|
|
} elseif ( ! is_paged() ) {
|
|
$author = get_query_var( 'author' );
|
|
|
|
// Don't 404 for authors without posts as long as they matched an author on this site.
|
|
if ( is_author() && is_numeric( $author ) && $author > 0 && is_user_member_of_blog( $author )
|
|
// Don't 404 for these queries if they matched an object.
|
|
|| ( is_tag() || is_category() || is_tax() || is_post_type_archive() ) && get_queried_object()
|
|
// Don't 404 for these queries either.
|
|
|| is_home() || is_search() || is_feed()
|
|
) {
|
|
$set_404 = false;
|
|
}
|
|
}
|
|
|
|
if ( $set_404 ) {
|
|
// Guess it's time to 404.
|
|
$wp_query->set_404();
|
|
status_header( 404 );
|
|
nocache_headers();
|
|
} else {
|
|
status_header( 200 );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sets up all of the variables required by the WordPress environment.
|
|
*
|
|
* The action {@see 'wp'} has one parameter that references the WP object. It
|
|
* allows for accessing the properties and methods to further manipulate the
|
|
* object.
|
|
*
|
|
* @since 2.0.0
|
|
*
|
|
* @param string|array $query_args Passed to parse_request().
|
|
*/
|
|
public function main( $query_args = '' ) {
|
|
$this->init();
|
|
|
|
$parsed = $this->parse_request( $query_args );
|
|
|
|
$this->send_headers();
|
|
|
|
if ( $parsed ) {
|
|
$this->query_posts();
|
|
$this->handle_404();
|
|
$this->register_globals();
|
|
}
|
|
|
|
/**
|
|
* Fires once the WordPress environment has been set up.
|
|
*
|
|
* @since 2.1.0
|
|
*
|
|
* @param WP $wp Current WordPress environment instance (passed by reference).
|
|
*/
|
|
do_action_ref_array( 'wp', array( &$this ) );
|
|
}
|
|
}
|