3 * WordPress environment setup class.
10 * Public query variables.
12 * Long list of public query variables.
18 var $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');
21 * Private query variables.
23 * Long list of private query variables.
28 var $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__in', 'post_parent__not_in' );
31 * Extra query variables set by the user.
36 var $extra_query_vars = array();
39 * Query variables for setting up the WordPress Query Loop.
47 * String parsed to set the query variables.
55 * Permalink or requested URI.
63 * Rewrite rule the request matched.
71 * Rewrite query the request matched.
79 * Whether already did the permalink.
84 var $did_permalink = false;
87 * Add name to list of public query variables.
91 * @param string $qv Query variable name.
93 function add_query_var($qv) {
94 if ( !in_array($qv, $this->public_query_vars) )
95 $this->public_query_vars[] = $qv;
99 * Set the value of a query variable.
103 * @param string $key Query variable name.
104 * @param mixed $value Query variable value.
106 function set_query_var($key, $value) {
107 $this->query_vars[$key] = $value;
111 * Parse request to find correct WordPress query.
113 * Sets up the query variables based on the request. There are also many
114 * filters and actions that can be used to further manipulate the result.
118 * @param array|string $extra_query_vars Set the extra query variables.
120 function parse_request($extra_query_vars = '') {
123 if ( ! apply_filters( 'do_parse_request', true, $this, $extra_query_vars ) )
126 $this->query_vars = array();
127 $post_type_query_vars = array();
129 if ( is_array($extra_query_vars) )
130 $this->extra_query_vars = & $extra_query_vars;
131 else if (! empty($extra_query_vars))
132 parse_str($extra_query_vars, $this->extra_query_vars);
134 // Process PATH_INFO, REQUEST_URI, and 404 for permalinks.
136 // Fetch the rewrite rules.
137 $rewrite = $wp_rewrite->wp_rewrite_rules();
139 if ( ! empty($rewrite) ) {
140 // If we match a rewrite rule, this will be cleared.
142 $this->did_permalink = true;
144 if ( isset($_SERVER['PATH_INFO']) )
145 $pathinfo = $_SERVER['PATH_INFO'];
148 $pathinfo_array = explode('?', $pathinfo);
149 $pathinfo = str_replace("%", "%25", $pathinfo_array[0]);
150 $req_uri = $_SERVER['REQUEST_URI'];
151 $req_uri_array = explode('?', $req_uri);
152 $req_uri = $req_uri_array[0];
153 $self = $_SERVER['PHP_SELF'];
154 $home_path = parse_url(home_url());
155 if ( isset($home_path['path']) )
156 $home_path = $home_path['path'];
159 $home_path = trim($home_path, '/');
161 // Trim path info from the end and the leading home path from the
162 // front. For path info requests, this leaves us with the requesting
163 // filename, if any. For 404 requests, this leaves us with the
164 // requested permalink.
165 $req_uri = str_replace($pathinfo, '', $req_uri);
166 $req_uri = trim($req_uri, '/');
167 $req_uri = preg_replace("|^$home_path|i", '', $req_uri);
168 $req_uri = trim($req_uri, '/');
169 $pathinfo = trim($pathinfo, '/');
170 $pathinfo = preg_replace("|^$home_path|i", '', $pathinfo);
171 $pathinfo = trim($pathinfo, '/');
172 $self = trim($self, '/');
173 $self = preg_replace("|^$home_path|i", '', $self);
174 $self = trim($self, '/');
176 // The requested permalink is in $pathinfo for path info requests and
177 // $req_uri for other requests.
178 if ( ! empty($pathinfo) && !preg_match('|^.*' . $wp_rewrite->index . '$|', $pathinfo) ) {
179 $request = $pathinfo;
181 // If the request uri is the index, blank it out so that we don't try to match it against a rule.
182 if ( $req_uri == $wp_rewrite->index )
187 $this->request = $request;
190 $request_match = $request;
191 if ( empty( $request_match ) ) {
192 // An empty request could only match against ^$ regex
193 if ( isset( $rewrite['$'] ) ) {
194 $this->matched_rule = '$';
195 $query = $rewrite['$'];
196 $matches = array('');
199 foreach ( (array) $rewrite as $match => $query ) {
200 // If the requesting file is the anchor of the match, prepend it to the path info.
201 if ( ! empty($req_uri) && strpos($match, $req_uri) === 0 && $req_uri != $request )
202 $request_match = $req_uri . '/' . $request;
204 if ( preg_match("#^$match#", $request_match, $matches) ||
205 preg_match("#^$match#", urldecode($request_match), $matches) ) {
207 if ( $wp_rewrite->use_verbose_page_rules && preg_match( '/pagename=\$matches\[([0-9]+)\]/', $query, $varmatch ) ) {
208 // this is a verbose page match, lets check to be sure about it
209 if ( ! get_page_by_path( $matches[ $varmatch[1] ] ) )
214 $this->matched_rule = $match;
220 if ( isset( $this->matched_rule ) ) {
221 // Trim the query of everything up to the '?'.
222 $query = preg_replace("!^.+\?!", '', $query);
224 // Substitute the substring matches into the query.
225 $query = addslashes(WP_MatchesMapRegex::apply($query, $matches));
227 $this->matched_query = $query;
230 parse_str($query, $perma_query_vars);
232 // If we're processing a 404 request, clear the error var since we found something.
233 if ( '404' == $error )
234 unset( $error, $_GET['error'] );
237 // If req_uri is empty or if it is a request for ourself, unset error.
238 if ( empty($request) || $req_uri == $self || strpos($_SERVER['PHP_SELF'], 'wp-admin/') !== false ) {
239 unset( $error, $_GET['error'] );
241 if ( isset($perma_query_vars) && strpos($_SERVER['PHP_SELF'], 'wp-admin/') !== false )
242 unset( $perma_query_vars );
244 $this->did_permalink = false;
248 $this->public_query_vars = apply_filters('query_vars', $this->public_query_vars);
250 foreach ( $GLOBALS['wp_post_types'] as $post_type => $t )
252 $post_type_query_vars[$t->query_var] = $post_type;
254 foreach ( $this->public_query_vars as $wpvar ) {
255 if ( isset( $this->extra_query_vars[$wpvar] ) )
256 $this->query_vars[$wpvar] = $this->extra_query_vars[$wpvar];
257 elseif ( isset( $_POST[$wpvar] ) )
258 $this->query_vars[$wpvar] = $_POST[$wpvar];
259 elseif ( isset( $_GET[$wpvar] ) )
260 $this->query_vars[$wpvar] = $_GET[$wpvar];
261 elseif ( isset( $perma_query_vars[$wpvar] ) )
262 $this->query_vars[$wpvar] = $perma_query_vars[$wpvar];
264 if ( !empty( $this->query_vars[$wpvar] ) ) {
265 if ( ! is_array( $this->query_vars[$wpvar] ) ) {
266 $this->query_vars[$wpvar] = (string) $this->query_vars[$wpvar];
268 foreach ( $this->query_vars[$wpvar] as $vkey => $v ) {
269 if ( !is_object( $v ) ) {
270 $this->query_vars[$wpvar][$vkey] = (string) $v;
275 if ( isset($post_type_query_vars[$wpvar] ) ) {
276 $this->query_vars['post_type'] = $post_type_query_vars[$wpvar];
277 $this->query_vars['name'] = $this->query_vars[$wpvar];
282 // Convert urldecoded spaces back into +
283 foreach ( $GLOBALS['wp_taxonomies'] as $taxonomy => $t )
284 if ( $t->query_var && isset( $this->query_vars[$t->query_var] ) )
285 $this->query_vars[$t->query_var] = str_replace( ' ', '+', $this->query_vars[$t->query_var] );
287 // Limit publicly queried post_types to those that are publicly_queryable
288 if ( isset( $this->query_vars['post_type']) ) {
289 $queryable_post_types = get_post_types( array('publicly_queryable' => true) );
290 if ( ! is_array( $this->query_vars['post_type'] ) ) {
291 if ( ! in_array( $this->query_vars['post_type'], $queryable_post_types ) )
292 unset( $this->query_vars['post_type'] );
294 $this->query_vars['post_type'] = array_intersect( $this->query_vars['post_type'], $queryable_post_types );
298 foreach ( (array) $this->private_query_vars as $var) {
299 if ( isset($this->extra_query_vars[$var]) )
300 $this->query_vars[$var] = $this->extra_query_vars[$var];
304 $this->query_vars['error'] = $error;
306 $this->query_vars = apply_filters('request', $this->query_vars);
308 do_action_ref_array('parse_request', array(&$this));
312 * Send additional HTTP headers for caching, content type, etc.
314 * Sets the X-Pingback header, 404 status (if 404), Content-type. If showing
315 * a feed, it will also send last-modified, etag, and 304 status if needed.
319 function send_headers() {
320 $headers = array('X-Pingback' => get_bloginfo('pingback_url'));
322 $exit_required = false;
324 if ( is_user_logged_in() )
325 $headers = array_merge($headers, wp_get_nocache_headers());
326 if ( ! empty( $this->query_vars['error'] ) ) {
327 $status = (int) $this->query_vars['error'];
328 if ( 404 === $status ) {
329 if ( ! is_user_logged_in() )
330 $headers = array_merge($headers, wp_get_nocache_headers());
331 $headers['Content-Type'] = get_option('html_type') . '; charset=' . get_option('blog_charset');
332 } elseif ( in_array( $status, array( 403, 500, 502, 503 ) ) ) {
333 $exit_required = true;
335 } else if ( empty($this->query_vars['feed']) ) {
336 $headers['Content-Type'] = get_option('html_type') . '; charset=' . get_option('blog_charset');
338 // We're showing a feed, so WP is indeed the only thing that last changed
339 if ( !empty($this->query_vars['withcomments'])
340 || ( empty($this->query_vars['withoutcomments'])
341 && ( !empty($this->query_vars['p'])
342 || !empty($this->query_vars['name'])
343 || !empty($this->query_vars['page_id'])
344 || !empty($this->query_vars['pagename'])
345 || !empty($this->query_vars['attachment'])
346 || !empty($this->query_vars['attachment_id'])
350 $wp_last_modified = mysql2date('D, d M Y H:i:s', get_lastcommentmodified('GMT'), 0).' GMT';
352 $wp_last_modified = mysql2date('D, d M Y H:i:s', get_lastpostmodified('GMT'), 0).' GMT';
353 $wp_etag = '"' . md5($wp_last_modified) . '"';
354 $headers['Last-Modified'] = $wp_last_modified;
355 $headers['ETag'] = $wp_etag;
357 // Support for Conditional GET
358 if (isset($_SERVER['HTTP_IF_NONE_MATCH']))
359 $client_etag = wp_unslash( $_SERVER['HTTP_IF_NONE_MATCH'] );
360 else $client_etag = false;
362 $client_last_modified = empty($_SERVER['HTTP_IF_MODIFIED_SINCE']) ? '' : trim($_SERVER['HTTP_IF_MODIFIED_SINCE']);
363 // If string is empty, return 0. If not, attempt to parse into a timestamp
364 $client_modified_timestamp = $client_last_modified ? strtotime($client_last_modified) : 0;
366 // Make a timestamp for our most recent modification...
367 $wp_modified_timestamp = strtotime($wp_last_modified);
369 if ( ($client_last_modified && $client_etag) ?
370 (($client_modified_timestamp >= $wp_modified_timestamp) && ($client_etag == $wp_etag)) :
371 (($client_modified_timestamp >= $wp_modified_timestamp) || ($client_etag == $wp_etag)) ) {
373 $exit_required = true;
377 $headers = apply_filters('wp_headers', $headers, $this);
379 if ( ! empty( $status ) )
380 status_header( $status );
382 // If Last-Modified is set to false, it should not be sent (no-cache situation).
383 if ( isset( $headers['Last-Modified'] ) && false === $headers['Last-Modified'] ) {
384 unset( $headers['Last-Modified'] );
386 // In PHP 5.3+, make sure we are not sending a Last-Modified header.
387 if ( function_exists( 'header_remove' ) ) {
388 @header_remove( 'Last-Modified' );
390 // In PHP 5.2, send an empty Last-Modified header, but only as a
391 // last resort to override a header already sent. #WP23021
392 foreach ( headers_list() as $header ) {
393 if ( 0 === stripos( $header, 'Last-Modified' ) ) {
394 $headers['Last-Modified'] = '';
401 foreach( (array) $headers as $name => $field_value )
402 @header("{$name}: {$field_value}");
404 if ( $exit_required )
407 do_action_ref_array('send_headers', array(&$this));
411 * Sets the query string property based off of the query variable property.
413 * The 'query_string' filter is deprecated, but still works. Plugins should
414 * use the 'request' filter instead.
418 function build_query_string() {
419 $this->query_string = '';
420 foreach ( (array) array_keys($this->query_vars) as $wpvar) {
421 if ( '' != $this->query_vars[$wpvar] ) {
422 $this->query_string .= (strlen($this->query_string) < 1) ? '' : '&';
423 if ( !is_scalar($this->query_vars[$wpvar]) ) // Discard non-scalars.
425 $this->query_string .= $wpvar . '=' . rawurlencode($this->query_vars[$wpvar]);
429 // query_string filter deprecated. Use request filter instead.
430 if ( has_filter('query_string') ) { // Don't bother filtering and parsing if no plugins are hooked in.
431 $this->query_string = apply_filters('query_string', $this->query_string);
432 parse_str($this->query_string, $this->query_vars);
437 * Set up the WordPress Globals.
439 * The query_vars property will be extracted to the GLOBALS. So care should
440 * be taken when naming global variables that might interfere with the
441 * WordPress environment.
443 * @global string $query_string Query string for the loop.
444 * @global int $more Only set, if single page or post.
445 * @global int $single If single page or post. Only set, if single page or post.
449 function register_globals() {
451 // Extract updated query vars back into global namespace.
452 foreach ( (array) $wp_query->query_vars as $key => $value) {
453 $GLOBALS[$key] = $value;
456 $GLOBALS['query_string'] = $this->query_string;
457 $GLOBALS['posts'] = & $wp_query->posts;
458 $GLOBALS['post'] = (isset($wp_query->post)) ? $wp_query->post : null;
459 $GLOBALS['request'] = $wp_query->request;
461 if ( is_single() || is_page() ) {
462 $GLOBALS['more'] = 1;
463 $GLOBALS['single'] = 1;
468 * Set up the current user.
473 wp_get_current_user();
477 * Set up the Loop based on the query variables.
479 * @uses WP::$query_vars
482 function query_posts() {
483 global $wp_the_query;
484 $this->build_query_string();
485 $wp_the_query->query($this->query_vars);
489 * Set the Headers for 404, if nothing is found for requested URL.
491 * Issue a 404 if a request doesn't match any posts and doesn't match
492 * any object (e.g. an existing-but-empty category, tag, author) and a 404 was not already
493 * issued, and if the request was not a search or the homepage.
495 * Otherwise, issue a 200.
499 function handle_404() {
502 // If we've already issued a 404, bail.
506 // Never 404 for the admin, robots, or if we found posts.
507 if ( is_admin() || is_robots() || $wp_query->posts ) {
508 status_header( 200 );
512 // We will 404 for paged queries, as no posts were found.
513 if ( ! is_paged() ) {
515 // Don't 404 for these queries if they matched an object.
516 if ( ( is_tag() || is_category() || is_tax() || is_author() || is_post_type_archive() ) && $wp_query->get_queried_object() ) {
517 status_header( 200 );
521 // Don't 404 for these queries either.
522 if ( is_home() || is_search() ) {
523 status_header( 200 );
528 // Guess it's time to 404.
529 $wp_query->set_404();
530 status_header( 404 );
535 * Sets up all of the variables required by the WordPress environment.
537 * The action 'wp' has one parameter that references the WP object. It
538 * allows for accessing the properties and methods to further manipulate the
543 * @param string|array $query_args Passed to {@link parse_request()}
545 function main($query_args = '') {
547 $this->parse_request($query_args);
548 $this->send_headers();
549 $this->query_posts();
551 $this->register_globals();
552 do_action_ref_array('wp', array(&$this));
558 * Helper class to remove the need to use eval to replace $matches[] in query strings.
562 class WP_MatchesMapRegex {
572 * store for mapping result
580 * subject to perform mapping on (query string containing $matches[] references
588 * regexp pattern to match $matches[] references
592 var $_pattern = '(\$matches\[[1-9]+[0-9]*\])'; // magic number
597 * @param string $subject subject if regex
598 * @param array $matches data to use in map
601 function WP_MatchesMapRegex($subject, $matches) {
602 $this->_subject = $subject;
603 $this->_matches = $matches;
604 $this->output = $this->_map();
608 * Substitute substring matches in subject.
610 * static helper function to ease use
613 * @param string $subject subject
614 * @param array $matches data used for substitution
617 public static function apply($subject, $matches) {
618 $oSelf = new WP_MatchesMapRegex($subject, $matches);
619 return $oSelf->output;
623 * do the actual mapping
629 $callback = array($this, 'callback');
630 return preg_replace_callback($this->_pattern, $callback, $this->_subject);
634 * preg_replace_callback hook
637 * @param array $matches preg_replace regexp matches
640 function callback($matches) {
641 $index = intval(substr($matches[0], 9, -1));
642 return ( isset( $this->_matches[$index] ) ? urlencode($this->_matches[$index]) : '' );