3 * Holds Most of the WordPress classes.
5 * Some of the other classes are contained in other files. For example, the
6 * WordPress cache is in cache.php and the WordPress roles API is in
7 * capabilities.php. The third party libraries are contained in their own
14 * WordPress environment setup class.
21 * Public query variables.
23 * Long list of public query variables.
29 var $public_query_vars = array('m', 'p', 'posts', 'w', 'cat', 'withcomments', 'withoutcomments', 's', 'search', 'exact', 'sentence', 'debug', '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');
32 * Private query variables.
34 * Long list of private query variables.
39 var $private_query_vars = array('offset', 'posts_per_page', 'posts_per_archive_page', 'what_to_show', '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');
42 * Extra query variables set by the user.
47 var $extra_query_vars = array();
50 * Query variables for setting up the WordPress Query Loop.
58 * String parsed to set the query variables.
66 * Permalink or requested URI.
74 * Rewrite rule the request matched.
82 * Rewrite query the request matched.
90 * Whether already did the permalink.
95 var $did_permalink = false;
98 * Add name to list of public query variables.
102 * @param string $qv Query variable name.
104 function add_query_var($qv) {
105 if ( !in_array($qv, $this->public_query_vars) )
106 $this->public_query_vars[] = $qv;
110 * Set the value of a query variable.
114 * @param string $key Query variable name.
115 * @param mixed $value Query variable value.
117 function set_query_var($key, $value) {
118 $this->query_vars[$key] = $value;
122 * Parse request to find correct WordPress query.
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.
129 * @param array|string $extra_query_vars Set the extra query variables.
131 function parse_request($extra_query_vars = '') {
134 $this->query_vars = array();
135 $taxonomy_query_vars = array();
137 if ( is_array($extra_query_vars) )
138 $this->extra_query_vars = & $extra_query_vars;
139 else if (! empty($extra_query_vars))
140 parse_str($extra_query_vars, $this->extra_query_vars);
142 // Process PATH_INFO, REQUEST_URI, and 404 for permalinks.
144 // Fetch the rewrite rules.
145 $rewrite = $wp_rewrite->wp_rewrite_rules();
147 if (! empty($rewrite)) {
148 // If we match a rewrite rule, this will be cleared.
150 $this->did_permalink = true;
152 if ( isset($_SERVER['PATH_INFO']) )
153 $pathinfo = $_SERVER['PATH_INFO'];
156 $pathinfo_array = explode('?', $pathinfo);
157 $pathinfo = str_replace("%", "%25", $pathinfo_array[0]);
158 $req_uri = $_SERVER['REQUEST_URI'];
159 $req_uri_array = explode('?', $req_uri);
160 $req_uri = $req_uri_array[0];
161 $self = $_SERVER['PHP_SELF'];
162 $home_path = parse_url(get_option('home'));
163 if ( isset($home_path['path']) )
164 $home_path = $home_path['path'];
167 $home_path = trim($home_path, '/');
169 // Trim path info from the end and the leading home path from the
170 // front. For path info requests, this leaves us with the requesting
171 // filename, if any. For 404 requests, this leaves us with the
172 // requested permalink.
173 $req_uri = str_replace($pathinfo, '', rawurldecode($req_uri));
174 $req_uri = trim($req_uri, '/');
175 $req_uri = preg_replace("|^$home_path|", '', $req_uri);
176 $req_uri = trim($req_uri, '/');
177 $pathinfo = trim($pathinfo, '/');
178 $pathinfo = preg_replace("|^$home_path|", '', $pathinfo);
179 $pathinfo = trim($pathinfo, '/');
180 $self = trim($self, '/');
181 $self = preg_replace("|^$home_path|", '', $self);
182 $self = trim($self, '/');
184 // The requested permalink is in $pathinfo for path info requests and
185 // $req_uri for other requests.
186 if ( ! empty($pathinfo) && !preg_match('|^.*' . $wp_rewrite->index . '$|', $pathinfo) ) {
187 $request = $pathinfo;
189 // If the request uri is the index, blank it out so that we don't try to match it against a rule.
190 if ( $req_uri == $wp_rewrite->index )
195 $this->request = $request;
198 $request_match = $request;
199 foreach ( (array) $rewrite as $match => $query) {
200 // Don't try to match against AtomPub calls
201 if ( $req_uri == 'wp-app.php' )
204 // If the requesting file is the anchor of the match, prepend it
206 if ((! empty($req_uri)) && (strpos($match, $req_uri) === 0) && ($req_uri != $request)) {
207 $request_match = $req_uri . '/' . $request;
210 if (preg_match("!^$match!", $request_match, $matches) ||
211 preg_match("!^$match!", urldecode($request_match), $matches)) {
213 $this->matched_rule = $match;
215 // Trim the query of everything up to the '?'.
216 $query = preg_replace("!^.+\?!", '', $query);
218 // Substitute the substring matches into the query.
219 eval("@\$query = \"" . addslashes($query) . "\";");
221 $this->matched_query = $query;
224 parse_str($query, $perma_query_vars);
226 // If we're processing a 404 request, clear the error var
227 // since we found something.
228 if (isset($_GET['error']))
229 unset($_GET['error']);
238 // If req_uri is empty or if it is a request for ourself, unset error.
239 if (empty($request) || $req_uri == $self || strpos($_SERVER['PHP_SELF'], 'wp-admin/') !== false) {
240 if (isset($_GET['error']))
241 unset($_GET['error']);
246 if (isset($perma_query_vars) && strpos($_SERVER['PHP_SELF'], 'wp-admin/') !== false)
247 unset($perma_query_vars);
249 $this->did_permalink = false;
253 $this->public_query_vars = apply_filters('query_vars', $this->public_query_vars);
255 foreach ( $GLOBALS['wp_taxonomies'] as $taxonomy => $t )
256 if ( isset($t->query_var) )
257 $taxonomy_query_vars[$t->query_var] = $taxonomy;
259 for ($i=0; $i<count($this->public_query_vars); $i += 1) {
260 $wpvar = $this->public_query_vars[$i];
261 if (isset($this->extra_query_vars[$wpvar]))
262 $this->query_vars[$wpvar] = $this->extra_query_vars[$wpvar];
263 elseif (isset($GLOBALS[$wpvar]))
264 $this->query_vars[$wpvar] = $GLOBALS[$wpvar];
265 elseif (!empty($_POST[$wpvar]))
266 $this->query_vars[$wpvar] = $_POST[$wpvar];
267 elseif (!empty($_GET[$wpvar]))
268 $this->query_vars[$wpvar] = $_GET[$wpvar];
269 elseif (!empty($perma_query_vars[$wpvar]))
270 $this->query_vars[$wpvar] = $perma_query_vars[$wpvar];
272 if ( !empty( $this->query_vars[$wpvar] ) ) {
273 $this->query_vars[$wpvar] = (string) $this->query_vars[$wpvar];
274 if ( in_array( $wpvar, $taxonomy_query_vars ) ) {
275 $this->query_vars['taxonomy'] = $taxonomy_query_vars[$wpvar];
276 $this->query_vars['term'] = $this->query_vars[$wpvar];
281 foreach ( (array) $this->private_query_vars as $var) {
282 if (isset($this->extra_query_vars[$var]))
283 $this->query_vars[$var] = $this->extra_query_vars[$var];
284 elseif (isset($GLOBALS[$var]) && '' != $GLOBALS[$var])
285 $this->query_vars[$var] = $GLOBALS[$var];
289 $this->query_vars['error'] = $error;
291 $this->query_vars = apply_filters('request', $this->query_vars);
293 do_action_ref_array('parse_request', array(&$this));
297 * Send additional HTTP headers for caching, content type, etc.
299 * Sets the X-Pingback header, 404 status (if 404), Content-type. If showing
300 * a feed, it will also send last-modified, etag, and 304 status if needed.
304 function send_headers() {
305 @header('X-Pingback: '. get_bloginfo('pingback_url'));
306 if ( is_user_logged_in() )
308 if ( !empty($this->query_vars['error']) && '404' == $this->query_vars['error'] ) {
309 status_header( 404 );
310 if ( !is_user_logged_in() )
312 @header('Content-Type: ' . get_option('html_type') . '; charset=' . get_option('blog_charset'));
313 } else if ( empty($this->query_vars['feed']) ) {
314 @header('Content-Type: ' . get_option('html_type') . '; charset=' . get_option('blog_charset'));
316 // We're showing a feed, so WP is indeed the only thing that last changed
317 if ( !empty($this->query_vars['withcomments'])
318 || ( empty($this->query_vars['withoutcomments'])
319 && ( !empty($this->query_vars['p'])
320 || !empty($this->query_vars['name'])
321 || !empty($this->query_vars['page_id'])
322 || !empty($this->query_vars['pagename'])
323 || !empty($this->query_vars['attachment'])
324 || !empty($this->query_vars['attachment_id'])
328 $wp_last_modified = mysql2date('D, d M Y H:i:s', get_lastcommentmodified('GMT'), 0).' GMT';
330 $wp_last_modified = mysql2date('D, d M Y H:i:s', get_lastpostmodified('GMT'), 0).' GMT';
331 $wp_etag = '"' . md5($wp_last_modified) . '"';
332 @header("Last-Modified: $wp_last_modified");
333 @header("ETag: $wp_etag");
335 // Support for Conditional GET
336 if (isset($_SERVER['HTTP_IF_NONE_MATCH']))
337 $client_etag = stripslashes(stripslashes($_SERVER['HTTP_IF_NONE_MATCH']));
338 else $client_etag = false;
340 $client_last_modified = empty($_SERVER['HTTP_IF_MODIFIED_SINCE']) ? '' : trim($_SERVER['HTTP_IF_MODIFIED_SINCE']);
341 // If string is empty, return 0. If not, attempt to parse into a timestamp
342 $client_modified_timestamp = $client_last_modified ? strtotime($client_last_modified) : 0;
344 // Make a timestamp for our most recent modification...
345 $wp_modified_timestamp = strtotime($wp_last_modified);
347 if ( ($client_last_modified && $client_etag) ?
348 (($client_modified_timestamp >= $wp_modified_timestamp) && ($client_etag == $wp_etag)) :
349 (($client_modified_timestamp >= $wp_modified_timestamp) || ($client_etag == $wp_etag)) ) {
350 status_header( 304 );
355 do_action_ref_array('send_headers', array(&$this));
359 * Sets the query string property based off of the query variable property.
361 * The 'query_string' filter is deprecated, but still works. Plugins should
362 * use the 'request' filter instead.
366 function build_query_string() {
367 $this->query_string = '';
368 foreach ( (array) array_keys($this->query_vars) as $wpvar) {
369 if ( '' != $this->query_vars[$wpvar] ) {
370 $this->query_string .= (strlen($this->query_string) < 1) ? '' : '&';
371 if ( !is_scalar($this->query_vars[$wpvar]) ) // Discard non-scalars.
373 $this->query_string .= $wpvar . '=' . rawurlencode($this->query_vars[$wpvar]);
377 // query_string filter deprecated. Use request filter instead.
378 if ( has_filter('query_string') ) { // Don't bother filtering and parsing if no plugins are hooked in.
379 $this->query_string = apply_filters('query_string', $this->query_string);
380 parse_str($this->query_string, $this->query_vars);
385 * Setup the WordPress Globals.
387 * The query_vars property will be extracted to the GLOBALS. So care should
388 * be taken when naming global variables that might interfere with the
389 * WordPress environment.
391 * @global string $query_string Query string for the loop.
392 * @global int $more Only set, if single page or post.
393 * @global int $single If single page or post. Only set, if single page or post.
397 function register_globals() {
399 // Extract updated query vars back into global namespace.
400 foreach ( (array) $wp_query->query_vars as $key => $value) {
401 $GLOBALS[$key] = $value;
404 $GLOBALS['query_string'] = & $this->query_string;
405 $GLOBALS['posts'] = & $wp_query->posts;
406 $GLOBALS['post'] = & $wp_query->post;
407 $GLOBALS['request'] = & $wp_query->request;
409 if ( is_single() || is_page() ) {
410 $GLOBALS['more'] = 1;
411 $GLOBALS['single'] = 1;
416 * Setup the current user.
421 wp_get_current_user();
425 * Setup the Loop based on the query variables.
427 * @uses WP::$query_vars
430 function query_posts() {
431 global $wp_the_query;
432 $this->build_query_string();
433 $wp_the_query->query($this->query_vars);
437 * Set the Headers for 404, if permalink is not found.
439 * Issue a 404 if a permalink request doesn't match any posts. Don't issue
440 * a 404 if one was already issued, if the request was a search, or if the
441 * request was a regular query string request rather than a permalink
442 * request. Issues a 200, if not 404.
446 function handle_404() {
449 if ( (0 == count($wp_query->posts)) && !is_404() && !is_search() && ( $this->did_permalink || (!empty($_SERVER['QUERY_STRING']) && (false === strpos($_SERVER['REQUEST_URI'], '?'))) ) ) {
450 // Don't 404 for these queries if they matched an object.
451 if ( ( is_tag() || is_category() || is_author() ) && $wp_query->get_queried_object() ) {
453 status_header( 200 );
456 $wp_query->set_404();
457 status_header( 404 );
459 } elseif ( !is_404() ) {
460 status_header( 200 );
465 * Sets up all of the variables required by the WordPress environment.
467 * The action 'wp' has one parameter that references the WP object. It
468 * allows for accessing the properties and methods to further manipulate the
473 * @param string|array $query_args Passed to {@link parse_request()}
475 function main($query_args = '') {
477 $this->parse_request($query_args);
478 $this->send_headers();
479 $this->query_posts();
481 $this->register_globals();
482 do_action_ref_array('wp', array(&$this));
486 * PHP4 Constructor - Does nothing.
488 * Call main() method when ready to run setup.
500 * WordPress Error class.
502 * Container for checking for WordPress errors and error messages. Return
503 * WP_Error and use {@link is_wp_error()} to check if this class is returned.
504 * Many core WordPress functions pass this class in the event of an error and
505 * if not handled properly will result in code errors.
512 * Stores the list of errors.
518 var $errors = array();
521 * Stores the list of data for error codes.
527 var $error_data = array();
530 * PHP4 Constructor - Sets up error message.
532 * If code parameter is empty then nothing will be done. It is possible to
533 * add multiple messages to the same code, but with other methods in the
536 * All parameters are optional, but if the code parameter is set, then the
537 * data parameter is optional.
541 * @param string|int $code Error code
542 * @param string $message Error message
543 * @param mixed $data Optional. Error data.
546 function WP_Error($code = '', $message = '', $data = '') {
550 $this->errors[$code][] = $message;
552 if ( ! empty($data) )
553 $this->error_data[$code] = $data;
557 * Retrieve all error codes.
562 * @return array List of error codes, if avaiable.
564 function get_error_codes() {
565 if ( empty($this->errors) )
568 return array_keys($this->errors);
572 * Retrieve first error code available.
577 * @return string|int Empty string, if no error codes.
579 function get_error_code() {
580 $codes = $this->get_error_codes();
589 * Retrieve all error messages or error messages matching code.
593 * @param string|int $code Optional. Retrieve messages matching code, if exists.
594 * @return array Error strings on success, or empty array on failure (if using codee parameter).
596 function get_error_messages($code = '') {
597 // Return all messages if no code specified.
598 if ( empty($code) ) {
599 $all_messages = array();
600 foreach ( (array) $this->errors as $code => $messages )
601 $all_messages = array_merge($all_messages, $messages);
603 return $all_messages;
606 if ( isset($this->errors[$code]) )
607 return $this->errors[$code];
613 * Get single error message.
615 * This will get the first message available for the code. If no code is
616 * given then the first code available will be used.
620 * @param string|int $code Optional. Error code to retrieve message.
623 function get_error_message($code = '') {
625 $code = $this->get_error_code();
626 $messages = $this->get_error_messages($code);
627 if ( empty($messages) )
633 * Retrieve error data for error code.
637 * @param string|int $code Optional. Error code.
638 * @return mixed Null, if no errors.
640 function get_error_data($code = '') {
642 $code = $this->get_error_code();
644 if ( isset($this->error_data[$code]) )
645 return $this->error_data[$code];
650 * Append more error messages to list of error messages.
655 * @param string|int $code Error code.
656 * @param string $message Error message.
657 * @param mixed $data Optional. Error data.
659 function add($code, $message, $data = '') {
660 $this->errors[$code][] = $message;
661 if ( ! empty($data) )
662 $this->error_data[$code] = $data;
666 * Add data for error code.
668 * The error code can only contain one error data.
672 * @param mixed $data Error data.
673 * @param string|int $code Error code.
675 function add_data($data, $code = '') {
677 $code = $this->get_error_code();
679 $this->error_data[$code] = $data;
684 * Check whether variable is a WordPress Error.
686 * Looks at the object and if a WP_Error class. Does not check to see if the
687 * parent is also WP_Error, so can't inherit WP_Error and still use this
692 * @param mixed $thing Check if unknown variable is WordPress Error object.
693 * @return bool True, if WP_Error. False, if not WP_Error.
695 function is_wp_error($thing) {
696 if ( is_object($thing) && is_a($thing, 'WP_Error') )
702 * A class for displaying various tree-like structures.
704 * Extend the Walker class to use it, see examples at the below. Child classes
705 * do not need to implement all of the abstract methods in the class. The child
706 * only needs to implement the methods that are needed. Also, the methods are
707 * not strictly abstract in that the parameter definition needs to be followed.
708 * The child classes can have additional parameters.
716 * What the class handles.
734 * Max number of pages walked by the paged walker
743 * Starts the list before the elements are added.
745 * Additional parameters are used in child classes. The args parameter holds
746 * additional values that may be used with the child class methods. This
747 * method is called at the start of the output list.
752 * @param string $output Passed by reference. Used to append additional content.
754 function start_lvl(&$output) {}
757 * Ends the list of after the elements are added.
759 * Additional parameters are used in child classes. The args parameter holds
760 * additional values that may be used with the child class methods. This
761 * method finishes the list at the end of output of the elements.
766 * @param string $output Passed by reference. Used to append additional content.
768 function end_lvl(&$output) {}
771 * Start the element output.
773 * Additional parameters are used in child classes. The args parameter holds
774 * additional values that may be used with the child class methods. Includes
775 * the element output also.
780 * @param string $output Passed by reference. Used to append additional content.
782 function start_el(&$output) {}
785 * Ends the element output, if needed.
787 * Additional parameters are used in child classes. The args parameter holds
788 * additional values that may be used with the child class methods.
793 * @param string $output Passed by reference. Used to append additional content.
795 function end_el(&$output) {}
798 * Traverse elements to create list from elements.
800 * Display one element if the element doesn't have any children otherwise,
801 * display the element and its children. Will only traverse up to the max
802 * depth and no ignore elements under that depth. It is possible to set the
803 * max depth to include all depths, see walk() method.
805 * This method shouldn't be called directly, use the walk() method instead.
809 * @param object $element Data object
810 * @param array $children_elements List of elements to continue traversing.
811 * @param int $max_depth Max depth to traverse.
812 * @param int $depth Depth of current element.
814 * @param string $output Passed by reference. Used to append additional content.
815 * @return null Null on failure with no changes to parameters.
817 function display_element( $element, &$children_elements, $max_depth, $depth=0, $args, &$output ) {
822 $id_field = $this->db_fields['id'];
824 //display this element
825 if ( is_array( $args[0] ) )
826 $args[0]['has_children'] = ! empty( $children_elements[$element->$id_field] );
827 $cb_args = array_merge( array(&$output, $element, $depth), $args);
828 call_user_func_array(array(&$this, 'start_el'), $cb_args);
830 $id = $element->$id_field;
832 // descend only when the depth is right and there are childrens for this element
833 if ( ($max_depth == 0 || $max_depth > $depth+1 ) && isset( $children_elements[$id]) ) {
835 foreach( $children_elements[ $id ] as $child ){
837 if ( !isset($newlevel) ) {
839 //start the child delimiter
840 $cb_args = array_merge( array(&$output, $depth), $args);
841 call_user_func_array(array(&$this, 'start_lvl'), $cb_args);
843 $this->display_element( $child, $children_elements, $max_depth, $depth + 1, $args, $output );
845 unset( $children_elements[ $id ] );
848 if ( isset($newlevel) && $newlevel ){
849 //end the child delimiter
850 $cb_args = array_merge( array(&$output, $depth), $args);
851 call_user_func_array(array(&$this, 'end_lvl'), $cb_args);
855 $cb_args = array_merge( array(&$output, $element, $depth), $args);
856 call_user_func_array(array(&$this, 'end_el'), $cb_args);
860 * Display array of elements hierarchically.
862 * It is a generic function which does not assume any existing order of
863 * elements. max_depth = -1 means flatly display every element. max_depth =
864 * 0 means display all levels. max_depth > 0 specifies the number of
869 * @param array $elements
870 * @param int $max_depth
873 function walk( $elements, $max_depth) {
875 $args = array_slice(func_get_args(), 2);
878 if ($max_depth < -1) //invalid parameter
881 if (empty($elements)) //nothing to walk
884 $id_field = $this->db_fields['id'];
885 $parent_field = $this->db_fields['parent'];
888 if ( -1 == $max_depth ) {
889 $empty_array = array();
890 foreach ( $elements as $e )
891 $this->display_element( $e, $empty_array, 1, 0, $args, $output );
896 * need to display in hierarchical order
897 * seperate elements into two buckets: top level and children elements
898 * children_elements is two dimensional array, eg.
899 * children_elements[10][] contains all sub-elements whose parent is 10.
901 $top_level_elements = array();
902 $children_elements = array();
903 foreach ( $elements as $e) {
904 if ( 0 == $e->$parent_field )
905 $top_level_elements[] = $e;
907 $children_elements[ $e->$parent_field ][] = $e;
911 * when none of the elements is top level
912 * assume the first one must be root of the sub elements
914 if ( empty($top_level_elements) ) {
916 $first = array_slice( $elements, 0, 1 );
919 $top_level_elements = array();
920 $children_elements = array();
921 foreach ( $elements as $e) {
922 if ( $root->$parent_field == $e->$parent_field )
923 $top_level_elements[] = $e;
925 $children_elements[ $e->$parent_field ][] = $e;
929 foreach ( $top_level_elements as $e )
930 $this->display_element( $e, $children_elements, $max_depth, 0, $args, $output );
933 * if we are displaying all levels, and remaining children_elements is not empty,
934 * then we got orphans, which should be displayed regardless
936 if ( ( $max_depth == 0 ) && count( $children_elements ) > 0 ) {
937 $empty_array = array();
938 foreach ( $children_elements as $orphans )
939 foreach( $orphans as $op )
940 $this->display_element( $op, $empty_array, 1, 0, $args, $output );
947 * paged_walk() - produce a page of nested elements
949 * Given an array of hierarchical elements, the maximum depth, a specific page number,
950 * and number of elements per page, this function first determines all top level root elements
951 * belonging to that page, then lists them and all of their children in hierarchical order.
955 * @param $max_depth = 0 means display all levels; $max_depth > 0 specifies the number of display levels.
956 * @param $page_num the specific page number, beginning with 1.
957 * @return XHTML of the specified page of elements
959 function paged_walk( $elements, $max_depth, $page_num, $per_page ) {
962 if ( empty($elements) || $max_depth < -1 )
965 $args = array_slice( func_get_args(), 4 );
968 $id_field = $this->db_fields['id'];
969 $parent_field = $this->db_fields['parent'];
972 if ( -1 == $max_depth )
973 $total_top = count( $elements );
974 if ( $page_num < 1 || $per_page < 0 ) {
978 if ( -1 == $max_depth )
980 $this->max_pages = 1;
983 $start = ( (int)$page_num - 1 ) * (int)$per_page;
984 $end = $start + $per_page;
985 if ( -1 == $max_depth )
986 $this->max_pages = ceil($total_top / $per_page);
990 if ( -1 == $max_depth ) {
991 if ( !empty($args[0]['reverse_top_level']) ) {
992 $elements = array_reverse( $elements );
994 $start = $total_top - $end;
995 $end = $total_top - $oldstart;
998 $empty_array = array();
999 foreach ( $elements as $e ) {
1001 if ( $count < $start )
1003 if ( $count >= $end )
1005 $this->display_element( $e, $empty_array, 1, 0, $args, $output );
1011 * seperate elements into two buckets: top level and children elements
1012 * children_elements is two dimensional array, eg.
1013 * children_elements[10][] contains all sub-elements whose parent is 10.
1015 $top_level_elements = array();
1016 $children_elements = array();
1017 foreach ( $elements as $e) {
1018 if ( 0 == $e->$parent_field )
1019 $top_level_elements[] = $e;
1021 $children_elements[ $e->$parent_field ][] = $e;
1024 $total_top = count( $top_level_elements );
1026 $this->max_pages = ceil($total_top / $per_page);
1030 if ( !empty($args[0]['reverse_top_level']) ) {
1031 $top_level_elements = array_reverse( $top_level_elements );
1033 $start = $total_top - $end;
1034 $end = $total_top - $oldstart;
1036 if ( !empty($args[0]['reverse_children']) ) {
1037 foreach ( $children_elements as $parent => $children )
1038 $children_elements[$parent] = array_reverse( $children );
1041 foreach ( $top_level_elements as $e ) {
1044 //for the last page, need to unset earlier children in order to keep track of orphans
1045 if ( $end >= $total_top && $count < $start )
1046 $this->unset_children( $e, $children_elements );
1048 if ( $count < $start )
1051 if ( $count >= $end )
1054 $this->display_element( $e, $children_elements, $max_depth, 0, $args, $output );
1057 if ( $end >= $total_top && count( $children_elements ) > 0 ) {
1058 $empty_array = array();
1059 foreach ( $children_elements as $orphans )
1060 foreach( $orphans as $op )
1061 $this->display_element( $op, $empty_array, 1, 0, $args, $output );
1067 function get_number_of_root_elements( $elements ){
1070 $parent_field = $this->db_fields['parent'];
1072 foreach ( $elements as $e) {
1073 if ( 0 == $e->$parent_field )
1079 // unset all the children for a given top level element
1080 function unset_children( $e, &$children_elements ){
1082 if ( !$e || !$children_elements )
1085 $id_field = $this->db_fields['id'];
1086 $id = $e->$id_field;
1088 if ( !empty($children_elements[$id]) && is_array($children_elements[$id]) )
1089 foreach ( (array) $children_elements[$id] as $child )
1090 $this->unset_children( $child, $children_elements );
1092 if ( isset($children_elements[$id]) )
1093 unset( $children_elements[$id] );
1099 * Create HTML list of pages.
1101 * @package WordPress
1105 class Walker_Page extends Walker {
1107 * @see Walker::$tree_type
1111 var $tree_type = 'page';
1114 * @see Walker::$db_fields
1116 * @todo Decouple this.
1119 var $db_fields = array ('parent' => 'post_parent', 'id' => 'ID');
1122 * @see Walker::start_lvl()
1125 * @param string $output Passed by reference. Used to append additional content.
1126 * @param int $depth Depth of page. Used for padding.
1128 function start_lvl(&$output, $depth) {
1129 $indent = str_repeat("\t", $depth);
1130 $output .= "\n$indent<ul>\n";
1134 * @see Walker::end_lvl()
1137 * @param string $output Passed by reference. Used to append additional content.
1138 * @param int $depth Depth of page. Used for padding.
1140 function end_lvl(&$output, $depth) {
1141 $indent = str_repeat("\t", $depth);
1142 $output .= "$indent</ul>\n";
1146 * @see Walker::start_el()
1149 * @param string $output Passed by reference. Used to append additional content.
1150 * @param object $page Page data object.
1151 * @param int $depth Depth of page. Used for padding.
1152 * @param int $current_page Page ID.
1153 * @param array $args
1155 function start_el(&$output, $page, $depth, $args, $current_page) {
1157 $indent = str_repeat("\t", $depth);
1161 extract($args, EXTR_SKIP);
1162 $css_class = 'page_item page-item-'.$page->ID;
1163 if ( !empty($current_page) ) {
1164 $_current_page = get_page( $current_page );
1165 if ( isset($_current_page->ancestors) && in_array($page->ID, (array) $_current_page->ancestors) )
1166 $css_class .= ' current_page_ancestor';
1167 if ( $page->ID == $current_page )
1168 $css_class .= ' current_page_item';
1169 elseif ( $_current_page && $page->ID == $_current_page->post_parent )
1170 $css_class .= ' current_page_parent';
1171 } elseif ( $page->ID == get_option('page_for_posts') ) {
1172 $css_class .= ' current_page_parent';
1175 $output .= $indent . '<li class="' . $css_class . '"><a href="' . get_page_link($page->ID) . '" title="' . attribute_escape(apply_filters('the_title', $page->post_title)) . '">' . $link_before . apply_filters('the_title', $page->post_title) . $link_after . '</a>';
1177 if ( !empty($show_date) ) {
1178 if ( 'modified' == $show_date )
1179 $time = $page->post_modified;
1181 $time = $page->post_date;
1183 $output .= " " . mysql2date($date_format, $time);
1188 * @see Walker::end_el()
1191 * @param string $output Passed by reference. Used to append additional content.
1192 * @param object $page Page data object. Not used.
1193 * @param int $depth Depth of page. Not Used.
1195 function end_el(&$output, $page, $depth) {
1196 $output .= "</li>\n";
1202 * Create HTML dropdown list of pages.
1204 * @package WordPress
1208 class Walker_PageDropdown extends Walker {
1210 * @see Walker::$tree_type
1214 var $tree_type = 'page';
1217 * @see Walker::$db_fields
1219 * @todo Decouple this
1222 var $db_fields = array ('parent' => 'post_parent', 'id' => 'ID');
1225 * @see Walker::start_el()
1228 * @param string $output Passed by reference. Used to append additional content.
1229 * @param object $page Page data object.
1230 * @param int $depth Depth of page in reference to parent pages. Used for padding.
1231 * @param array $args Uses 'selected' argument for selected page to set selected HTML attribute for option element.
1233 function start_el(&$output, $page, $depth, $args) {
1234 $pad = str_repeat(' ', $depth * 3);
1236 $output .= "\t<option class=\"level-$depth\" value=\"$page->ID\"";
1237 if ( $page->ID == $args['selected'] )
1238 $output .= ' selected="selected"';
1240 $title = wp_specialchars($page->post_title);
1241 $output .= "$pad$title";
1242 $output .= "</option>\n";
1247 * Create HTML list of categories.
1249 * @package WordPress
1253 class Walker_Category extends Walker {
1255 * @see Walker::$tree_type
1259 var $tree_type = 'category';
1262 * @see Walker::$db_fields
1264 * @todo Decouple this
1267 var $db_fields = array ('parent' => 'parent', 'id' => 'term_id');
1270 * @see Walker::start_lvl()
1273 * @param string $output Passed by reference. Used to append additional content.
1274 * @param int $depth Depth of category. Used for tab indentation.
1275 * @param array $args Will only append content if style argument value is 'list'.
1277 function start_lvl(&$output, $depth, $args) {
1278 if ( 'list' != $args['style'] )
1281 $indent = str_repeat("\t", $depth);
1282 $output .= "$indent<ul class='children'>\n";
1286 * @see Walker::end_lvl()
1289 * @param string $output Passed by reference. Used to append additional content.
1290 * @param int $depth Depth of category. Used for tab indentation.
1291 * @param array $args Will only append content if style argument value is 'list'.
1293 function end_lvl(&$output, $depth, $args) {
1294 if ( 'list' != $args['style'] )
1297 $indent = str_repeat("\t", $depth);
1298 $output .= "$indent</ul>\n";
1302 * @see Walker::start_el()
1305 * @param string $output Passed by reference. Used to append additional content.
1306 * @param object $category Category data object.
1307 * @param int $depth Depth of category in reference to parents.
1308 * @param array $args
1310 function start_el(&$output, $category, $depth, $args) {
1313 $cat_name = attribute_escape( $category->name);
1314 $cat_name = apply_filters( 'list_cats', $cat_name, $category );
1315 $link = '<a href="' . get_category_link( $category->term_id ) . '" ';
1316 if ( $use_desc_for_title == 0 || empty($category->description) )
1317 $link .= 'title="' . sprintf(__( 'View all posts filed under %s' ), $cat_name) . '"';
1319 $link .= 'title="' . attribute_escape( apply_filters( 'category_description', $category->description, $category )) . '"';
1321 $link .= $cat_name . '</a>';
1323 if ( (! empty($feed_image)) || (! empty($feed)) ) {
1326 if ( empty($feed_image) )
1329 $link .= '<a href="' . get_category_feed_link($category->term_id, $feed_type) . '"';
1332 $alt = ' alt="' . sprintf(__( 'Feed for all posts filed under %s' ), $cat_name ) . '"';
1334 $title = ' title="' . $feed . '"';
1335 $alt = ' alt="' . $feed . '"';
1342 if ( empty($feed_image) )
1345 $link .= "<img src='$feed_image'$alt$title" . ' />';
1347 if ( empty($feed_image) )
1351 if ( isset($show_count) && $show_count )
1352 $link .= ' (' . intval($category->count) . ')';
1354 if ( isset($show_date) && $show_date ) {
1355 $link .= ' ' . gmdate('Y-m-d', $category->last_update_timestamp);
1358 if ( isset($current_category) && $current_category )
1359 $_current_category = get_category( $current_category );
1361 if ( 'list' == $args['style'] ) {
1363 $class = 'cat-item cat-item-'.$category->term_id;
1364 if ( isset($current_category) && $current_category && ($category->term_id == $current_category) )
1365 $class .= ' current-cat';
1366 elseif ( isset($_current_category) && $_current_category && ($category->term_id == $_current_category->parent) )
1367 $class .= ' current-cat-parent';
1368 $output .= ' class="'.$class.'"';
1369 $output .= ">$link\n";
1371 $output .= "\t$link<br />\n";
1376 * @see Walker::end_el()
1379 * @param string $output Passed by reference. Used to append additional content.
1380 * @param object $page Not used.
1381 * @param int $depth Depth of category. Not used.
1382 * @param array $args Only uses 'list' for whether should append to output.
1384 function end_el(&$output, $page, $depth, $args) {
1385 if ( 'list' != $args['style'] )
1388 $output .= "</li>\n";
1394 * Create HTML dropdown list of Categories.
1396 * @package WordPress
1400 class Walker_CategoryDropdown extends Walker {
1402 * @see Walker::$tree_type
1406 var $tree_type = 'category';
1409 * @see Walker::$db_fields
1411 * @todo Decouple this
1414 var $db_fields = array ('parent' => 'parent', 'id' => 'term_id');
1417 * @see Walker::start_el()
1420 * @param string $output Passed by reference. Used to append additional content.
1421 * @param object $category Category data object.
1422 * @param int $depth Depth of category. Used for padding.
1423 * @param array $args Uses 'selected', 'show_count', and 'show_last_update' keys, if they exist.
1425 function start_el(&$output, $category, $depth, $args) {
1426 $pad = str_repeat(' ', $depth * 3);
1428 $cat_name = apply_filters('list_cats', $category->name, $category);
1429 $output .= "\t<option class=\"level-$depth\" value=\"".$category->term_id."\"";
1430 if ( $category->term_id == $args['selected'] )
1431 $output .= ' selected="selected"';
1433 $output .= $pad.$cat_name;
1434 if ( $args['show_count'] )
1435 $output .= ' ('. $category->count .')';
1436 if ( $args['show_last_update'] ) {
1438 $output .= ' ' . gmdate($format, $category->last_update_timestamp);
1440 $output .= "</option>\n";
1445 * Send XML response back to AJAX request.
1447 * @package WordPress
1450 class WP_Ajax_Response {
1452 * Store XML responses to send.
1458 var $responses = array();
1461 * PHP4 Constructor - Passes args to {@link WP_Ajax_Response::add()}.
1464 * @see WP_Ajax_Response::add()
1466 * @param string|array $args Optional. Will be passed to add() method.
1467 * @return WP_Ajax_Response
1469 function WP_Ajax_Response( $args = '' ) {
1470 if ( !empty($args) )
1475 * Append to XML response based on given arguments.
1477 * The arguments that can be passed in the $args parameter are below. It is
1478 * also possible to pass a WP_Error object in either the 'id' or 'data'
1479 * argument. The parameter isn't actually optional, content should be given
1480 * in order to send the correct response.
1482 * 'what' argument is a string that is the XMLRPC response type.
1483 * 'action' argument is a boolean or string that acts like a nonce.
1484 * 'id' argument can be WP_Error or an integer.
1485 * 'old_id' argument is false by default or an integer of the previous ID.
1486 * 'position' argument is an integer or a string with -1 = top, 1 = bottom,
1487 * html ID = after, -html ID = before.
1488 * 'data' argument is a string with the content or message.
1489 * 'supplemental' argument is an array of strings that will be children of
1490 * the supplemental element.
1494 * @param string|array $args Override defaults.
1495 * @return string XML response.
1497 function add( $args = '' ) {
1499 'what' => 'object', 'action' => false,
1500 'id' => '0', 'old_id' => false,
1502 'data' => '', 'supplemental' => array()
1505 $r = wp_parse_args( $args, $defaults );
1506 extract( $r, EXTR_SKIP );
1507 $position = preg_replace( '/[^a-z0-9:_-]/i', '', $position );
1509 if ( is_wp_error($id) ) {
1515 if ( is_wp_error($data) ) {
1516 foreach ( (array) $data->get_error_codes() as $code ) {
1517 $response .= "<wp_error code='$code'><![CDATA[" . $data->get_error_message($code) . "]]></wp_error>";
1518 if ( !$error_data = $data->get_error_data($code) )
1521 if ( is_object($error_data) ) {
1522 $class = ' class="' . get_class($error_data) . '"';
1523 $error_data = get_object_vars($error_data);
1526 $response .= "<wp_error_data code='$code'$class>";
1528 if ( is_scalar($error_data) ) {
1529 $response .= "<![CDATA[$error_data]]>";
1530 } elseif ( is_array($error_data) ) {
1531 foreach ( $error_data as $k => $v )
1532 $response .= "<$k><![CDATA[$v]]></$k>";
1535 $response .= "</wp_error_data>";
1538 $response = "<response_data><![CDATA[$data]]></response_data>";
1542 if ( is_array($supplemental) ) {
1543 foreach ( $supplemental as $k => $v )
1544 $s .= "<$k><![CDATA[$v]]></$k>";
1545 $s = "<supplemental>$s</supplemental>";
1548 if ( false === $action )
1549 $action = $_POST['action'];
1552 $x .= "<response action='{$action}_$id'>"; // The action attribute in the xml output is formatted like a nonce action
1553 $x .= "<$what id='$id' " . ( false === $old_id ? '' : "old_id='$old_id' " ) . "position='$position'>";
1557 $x .= "</response>";
1559 $this->responses[] = $x;
1564 * Display XML formatted responses.
1566 * Sets the content type header to text/xml.
1571 header('Content-Type: text/xml');
1572 echo "<?xml version='1.0' standalone='yes'?><wp_ajax>";
1573 foreach ( (array) $this->responses as $response )