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<?php
/**
* WordPress environment setup class.
*
* @package WordPress
* @since 2.0.0
*/
class WP {
/**
* Public query variables.
*
* Long list of public query variables.
*
* @since 2.0.0
* @access public
* @var array
*/
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', 'static', 'pagename', 'page_id', 'error', 'comments_popup', 'attachment', 'attachment_id', 'subpost', 'subpost_id', 'preview', 'robots', 'taxonomy', 'term', 'cpage', 'post_type');
/**
* Private query variables.
*
* Long list of private query variables.
*
* @since 2.0.0
* @var array
*/
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' );
/**
* Extra query variables set by the user.
*
* @since 2.1.0
* @var array
*/
public $extra_query_vars = array();
/**
* Query variables for setting up the WordPress Query Loop.
*
* @since 2.0.0
* @var array
*/
public $query_vars;
/**
* String parsed to set the query variables.
*
* @since 2.0.0
* @var string
*/
public $query_string;
/**
* Permalink or requested URI.
*
* @since 2.0.0
* @var string
*/
public $request;
/**
* Rewrite rule the request matched.
*
* @since 2.0.0
* @var string
*/
public $matched_rule;
/**
* Rewrite query the request matched.
*
* @since 2.0.0
* @var string
*/
public $matched_query;
/**
* Whether already did the permalink.
*
* @since 2.0.0
* @var bool
*/
public $did_permalink = false;
/**
* Add name to list of public query variables.
*
* @since 2.1.0
*
* @param string $qv Query variable name.
*/
public function add_query_var($qv) {
if ( !in_array($qv, $this->public_query_vars) )
$this->public_query_vars[] = $qv;
}
/**
* Set the value of a query variable.
*
* @since 2.3.0
*
* @param string $key Query variable name.
* @param mixed $value Query variable value.
*/
public function set_query_var($key, $value) {
$this->query_vars[$key] = $value;
}
/**
* Parse request to find correct WordPress query.
*
* Sets up the query variables based on the request. There are also many
* filters and actions that can be used to further manipulate the result.
*
* @since 2.0.0
*
* @param array|string $extra_query_vars Set the extra query variables.
*/
public function parse_request($extra_query_vars = '') {
global $wp_rewrite;
/**
* Filter whether to parse the request.
*
* @since 3.5.0
*
* @param bool $bool Whether or not to parse the request. Default true.
* @param WP $this Current WordPress environment instance.
* @param array|string $extra_query_vars Extra passed query variables.
*/
if ( ! apply_filters( 'do_parse_request', true, $this, $extra_query_vars ) )
return;
$this->query_vars = array();
$post_type_query_vars = array();
if ( is_array( $extra_query_vars ) ) {
$this->extra_query_vars = & $extra_query_vars;
} elseif ( ! empty( $extra_query_vars ) ) {
parse_str( $extra_query_vars, $this->extra_query_vars );
}
// Process PATH_INFO, REQUEST_URI, and 404 for permalinks.
// Fetch the rewrite rules.
$rewrite = $wp_rewrite->wp_rewrite_rules();
if ( ! empty($rewrite) ) {
// If we match a rewrite rule, this will be cleared.
$error = '404';
$this->did_permalink = true;
$pathinfo = isset( $_SERVER['PATH_INFO'] ) ? $_SERVER['PATH_INFO'] : '';
list( $pathinfo ) = explode( '?', $pathinfo );
$pathinfo = str_replace( "%", "%25", $pathinfo );
list( $req_uri ) = explode( '?', $_SERVER['REQUEST_URI'] );
$self = $_SERVER['PHP_SELF'];
$home_path = trim( parse_url( home_url(), PHP_URL_PATH ), '/' );
// Trim path info from the end and the leading home path from the
// front. For path info requests, this leaves us with the requesting
// filename, if any. For 404 requests, this leaves us with the
// requested permalink.
$req_uri = str_replace($pathinfo, '', $req_uri);
$req_uri = trim($req_uri, '/');
$req_uri = preg_replace("|^$home_path|i", '', $req_uri);
$req_uri = trim($req_uri, '/');
$pathinfo = trim($pathinfo, '/');
$pathinfo = preg_replace("|^$home_path|i", '', $pathinfo);
$pathinfo = trim($pathinfo, '/');
$self = trim($self, '/');
$self = preg_replace("|^$home_path|i", '', $self);
$self = trim($self, '/');
// The requested permalink is in $pathinfo for path info requests and
// $req_uri for other requests.
if ( ! empty($pathinfo) && !preg_match('|^.*' . $wp_rewrite->index . '$|', $pathinfo) ) {
$request = $pathinfo;
} else {
// If the request uri is the index, blank it out so that we don't try to match it against a rule.
if ( $req_uri == $wp_rewrite->index )
$req_uri = '';
$request = $req_uri;
}
$this->request = $request;
// Look for matches.
$request_match = $request;
if ( empty( $request_match ) ) {
// An empty request could only match against ^$ regex
if ( isset( $rewrite['$'] ) ) {
$this->matched_rule = '$';
$query = $rewrite['$'];
$matches = array('');
}
} else {
foreach ( (array) $rewrite as $match => $query ) {
// If the requesting file is the anchor of the match, prepend it to the path info.
if ( ! empty($req_uri) && strpos($match, $req_uri) === 0 && $req_uri != $request )
$request_match = $req_uri . '/' . $request;
if ( preg_match("#^$match#", $request_match, $matches) ||
preg_match("#^$match#", urldecode($request_match), $matches) ) {
if ( $wp_rewrite->use_verbose_page_rules && preg_match( '/pagename=\$matches\[([0-9]+)\]/', $query, $varmatch ) ) {
// This is a verbose page match, let's check to be sure about it.
if ( ! get_page_by_path( $matches[ $varmatch[1] ] ) )
continue;
}
// Got a match.
$this->matched_rule = $match;
break;
}
}
}
if ( isset( $this->matched_rule ) ) {
// Trim the query of everything up to the '?'.
$query = preg_replace("!^.+\?!", '', $query);
// Substitute the substring matches into the query.
$query = addslashes(WP_MatchesMapRegex::apply($query, $matches));
$this->matched_query = $query;
// Parse the query.
parse_str($query, $perma_query_vars);
// If we're processing a 404 request, clear the error var since we found something.
if ( '404' == $error )
unset( $error, $_GET['error'] );
}
// If req_uri is empty or if it is a request for ourself, unset error.
if ( empty($request) || $req_uri == $self || strpos($_SERVER['PHP_SELF'], 'wp-admin/') !== false ) {
unset( $error, $_GET['error'] );
if ( isset($perma_query_vars) && strpos($_SERVER['PHP_SELF'], 'wp-admin/') !== false )
unset( $perma_query_vars );
$this->did_permalink = false;
}
}
/**
* Filter the query variables whitelist before processing.
*
* Allows (publicly allowed) query vars to be added, removed, or changed prior
* to executing the query. Needed to allow custom rewrite rules using your own arguments
* to work, or any other custom query variables you want to be publicly available.
*
* @since 1.5.0
*
* @param array $public_query_vars The array of whitelisted query variables.
*/
$this->public_query_vars = apply_filters( 'query_vars', $this->public_query_vars );
foreach ( get_post_types( array(), 'objects' ) as $post_type => $t )
if ( $t->query_var )
$post_type_query_vars[$t->query_var] = $post_type;
foreach ( $this->public_query_vars as $wpvar ) {
if ( isset( $this->extra_query_vars[$wpvar] ) )
$this->query_vars[$wpvar] = $this->extra_query_vars[$wpvar];
elseif ( isset( $_POST[$wpvar] ) )
$this->query_vars[$wpvar] = $_POST[$wpvar];
elseif ( isset( $_GET[$wpvar] ) )
$this->query_vars[$wpvar] = $_GET[$wpvar];
elseif ( isset( $perma_query_vars[$wpvar] ) )
$this->query_vars[$wpvar] = $perma_query_vars[$wpvar];
if ( !empty( $this->query_vars[$wpvar] ) ) {
if ( ! is_array( $this->query_vars[$wpvar] ) ) {
$this->query_vars[$wpvar] = (string) $this->query_vars[$wpvar];
} else {
foreach ( $this->query_vars[$wpvar] as $vkey => $v ) {
if ( !is_object( $v ) ) {
$this->query_vars[$wpvar][$vkey] = (string) $v;
}
}
}
if ( isset($post_type_query_vars[$wpvar] ) ) {
$this->query_vars['post_type'] = $post_type_query_vars[$wpvar];
$this->query_vars['name'] = $this->query_vars[$wpvar];
}
}
}
// Convert urldecoded spaces back into +
foreach ( get_taxonomies( array() , 'objects' ) as $taxonomy => $t )
if ( $t->query_var && isset( $this->query_vars[$t->query_var] ) )
$this->query_vars[$t->query_var] = str_replace( ' ', '+', $this->query_vars[$t->query_var] );
// Limit publicly queried post_types to those that are publicly_queryable
if ( isset( $this->query_vars['post_type']) ) {
$queryable_post_types = get_post_types( array('publicly_queryable' => true) );
if ( ! is_array( $this->query_vars['post_type'] ) ) {
if ( ! in_array( $this->query_vars['post_type'], $queryable_post_types ) )
unset( $this->query_vars['post_type'] );
} else {
$this->query_vars['post_type'] = array_intersect( $this->query_vars['post_type'], $queryable_post_types );
}
}
foreach ( (array) $this->private_query_vars as $var) {
if ( isset($this->extra_query_vars[$var]) )
$this->query_vars[$var] = $this->extra_query_vars[$var];
}
if ( isset($error) )
$this->query_vars['error'] = $error;
/**
* Filter the array of parsed query variables.
*
* @since 2.1.0
*
* @param array $query_vars The array of requested query variables.
*/
$this->query_vars = apply_filters( 'request', $this->query_vars );
/**
* Fires once all query variables for the current request have been parsed.
*
* @since 2.1.0
*
* @param WP &$this Current WordPress environment instance (passed by reference).
*/
do_action_ref_array( 'parse_request', array( &$this ) );
}
/**
* Send additional HTTP headers for caching, content type, etc.
*
* Sets the X-Pingback header, 404 status (if 404), Content-type. If showing
* a feed, it will also send last-modified, etag, and 304 status if needed.
*
* @since 2.0.0
*/
public function send_headers() {
$headers = array('X-Pingback' => get_bloginfo('pingback_url'));
$status = null;
$exit_required = false;
if ( is_user_logged_in() )
$headers = array_merge($headers, wp_get_nocache_headers());
if ( ! empty( $this->query_vars['error'] ) ) {
$status = (int) $this->query_vars['error'];
if ( 404 === $status ) {
if ( ! is_user_logged_in() )
$headers = array_merge($headers, wp_get_nocache_headers());
$headers['Content-Type'] = get_option('html_type') . '; charset=' . get_option('blog_charset');
} elseif ( in_array( $status, array( 403, 500, 502, 503 ) ) ) {
$exit_required = true;
}
} elseif ( empty( $this->query_vars['feed'] ) ) {
$headers['Content-Type'] = get_option('html_type') . '; charset=' . get_option('blog_charset');
} else {
// We're showing a feed, so WP is indeed the only thing that last changed
if ( !empty($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 = mysql2date('D, d M Y H:i:s', get_lastcommentmodified('GMT'), 0).' GMT';
else
$wp_last_modified = mysql2date('D, d M Y H:i:s', get_lastpostmodified('GMT'), 0).' 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;
}
}
/**
* Filter the HTTP headers before they're sent to the browser.
*
* @since 2.8.0
*
* @param array $headers The list of headers to be sent.
* @param WP $this 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'] );
// In PHP 5.3+, make sure we are not sending a Last-Modified header.
if ( function_exists( 'header_remove' ) ) {
@header_remove( 'Last-Modified' );
} else {
// In PHP 5.2, send an empty Last-Modified header, but only as a
// last resort to override a header already sent. #WP23021
foreach ( headers_list() as $header ) {
if ( 0 === stripos( $header, 'Last-Modified' ) ) {
$headers['Last-Modified'] = '';
break;
}
}
}
}
foreach( (array) $headers as $name => $field_value )
@header("{$name}: {$field_value}");
if ( $exit_required )
exit();
/**
* Fires once the requested HTTP headers for caching, content type, etc. have been sent.
*
* @since 2.1.0
*
* @param WP &$this 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 'query_string' filter is deprecated, but still works. Plugins should
* use the '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.
/**
* Filter the query string before parsing.
*
* @since 1.5.0
* @deprecated 2.1.0 Use 'query_vars' or 'request' filters instead.
*
* @param string $query_string The query string to modify.
*/
$this->query_string = apply_filters( 'query_string', $this->query_string );
parse_str($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.
*
* @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.
*
* @since 2.0.0
*/
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() && isset( $wp_query->post ) )
$GLOBALS['authordata'] = get_userdata( $wp_query->post->post_author );
}
/**
* 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
*/
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.
*
* @since 2.0.0
*/
public function handle_404() {
global $wp_query;
// If we've already issued a 404, bail.
if ( is_404() )
return;
// Never 404 for the admin, robots, or if we found posts.
if ( is_admin() || is_robots() || $wp_query->posts ) {
status_header( 200 );
return;
}
// We will 404 for paged queries, as no posts were found.
if ( ! is_paged() ) {
// Don't 404 for authors without posts as long as they matched an author on this site.
$author = get_query_var( 'author' );
if ( is_author() && is_numeric( $author ) && $author > 0 && is_user_member_of_blog( $author ) ) {
status_header( 200 );
return;
}
// Don't 404 for these queries if they matched an object.
if ( ( is_tag() || is_category() || is_tax() || is_post_type_archive() ) && get_queried_object() ) {
status_header( 200 );
return;
}
// Don't 404 for these queries either.
if ( is_home() || is_search() || is_feed() ) {
status_header( 200 );
return;
}
}
// Guess it's time to 404.
$wp_query->set_404();
status_header( 404 );
nocache_headers();
}
/**
* Sets up all of the variables required by the WordPress environment.
*
* The action '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 $query_args Passed to {@link parse_request()}
*/
public function main($query_args = '') {
$this->init();
$this->parse_request($query_args);
$this->send_headers();
$this->query_posts();
$this->handle_404();
$this->register_globals();
/**
* Fires once the WordPress environment has been set up.
*
* @since 2.1.0
*
* @param WP &$this Current WordPress environment instance (passed by reference).
*/
do_action_ref_array( 'wp', array( &$this ) );
}
}
/**
* Helper class to remove the need to use eval to replace $matches[] in query strings.
*
* @since 2.9.0
*/
class WP_MatchesMapRegex {
/**
* store for matches
*
* @access private
* @var array
*/
private $_matches;
/**
* store for mapping result
*
* @access public
* @var string
*/
public $output;
/**
* subject to perform mapping on (query string containing $matches[] references
*
* @access private
* @var string
*/
private $_subject;
/**
* regexp pattern to match $matches[] references
*
* @var string
*/
public $_pattern = '(\$matches\[[1-9]+[0-9]*\])'; // magic number
/**
* constructor
*
* @param string $subject subject if regex
* @param array $matches data to use in map
*/
public function __construct($subject, $matches) {
$this->_subject = $subject;
$this->_matches = $matches;
$this->output = $this->_map();
}
/**
* Substitute substring matches in subject.
*
* static helper function to ease use
*
* @access public
* @param string $subject subject
* @param array $matches data used for substitution
* @return string
*/
public static function apply($subject, $matches) {
$oSelf = new WP_MatchesMapRegex($subject, $matches);
return $oSelf->output;
}
/**
* do the actual mapping
*
* @access private
* @return string
*/
private function _map() {
$callback = array($this, 'callback');
return preg_replace_callback($this->_pattern, $callback, $this->_subject);
}
/**
* preg_replace_callback hook
*
* @access public
* @param array $matches preg_replace regexp matches
* @return string
*/
public function callback($matches) {
$index = intval(substr($matches[0], 9, -1));
return ( isset( $this->_matches[$index] ) ? urlencode($this->_matches[$index]) : '' );
}
}
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