/wp-includes/category.php
PHP | 331 lines | 253 code | 58 blank | 20 comment | 74 complexity | 374e17346a873a201af25191badd5f6a MD5 | raw file
- <?php
- function get_all_category_ids() {
- global $wpdb;
- if ( ! $cat_ids = wp_cache_get('all_category_ids', 'category') ) {
- $cat_ids = $wpdb->get_col("SELECT cat_ID FROM $wpdb->categories");
- wp_cache_add('all_category_ids', $cat_ids, 'category');
- }
- return $cat_ids;
- }
- function &get_categories($args = '') {
- global $wpdb, $category_links;
- if ( is_array($args) )
- $r = &$args;
- else
- parse_str($args, $r);
- $defaults = array('type' => 'post', 'child_of' => 0, 'orderby' => 'name', 'order' => 'ASC',
- 'hide_empty' => true, 'include_last_update_time' => false, 'hierarchical' => 1, 'exclude' => '', 'include' => '',
- 'number' => '', 'pad_counts' => false);
- $r = array_merge($defaults, $r);
- if ( 'count' == $r['orderby'] )
- $r['orderby'] = 'category_count';
- else
- $r['orderby'] = "cat_" . $r['orderby']; // restricts order by to cat_ID and cat_name fields
- $r['number'] = (int) $r['number'];
- extract($r, EXTR_SKIP);
- $key = md5( serialize( $r ) );
- if ( $cache = wp_cache_get( 'get_categories', 'category' ) )
- if ( isset( $cache[ $key ] ) )
- return apply_filters('get_categories', $cache[$key], $r);
- $where = 'cat_ID > 0';
- $inclusions = '';
- if ( !empty($include) ) {
- $child_of = 0; //ignore child_of and exclude params if using include
- $exclude = '';
- $incategories = preg_split('/[\s,]+/',$include);
- if ( count($incategories) ) {
- foreach ( $incategories as $incat ) {
- if (empty($inclusions))
- $inclusions = ' AND ( cat_ID = ' . intval($incat) . ' ';
- else
- $inclusions .= ' OR cat_ID = ' . intval($incat) . ' ';
- }
- }
- }
- if (!empty($inclusions))
- $inclusions .= ')';
- $where .= $inclusions;
- $exclusions = '';
- if ( !empty($exclude) ) {
- $excategories = preg_split('/[\s,]+/',$exclude);
- if ( count($excategories) ) {
- foreach ( $excategories as $excat ) {
- if (empty($exclusions))
- $exclusions = ' AND ( cat_ID <> ' . intval($excat) . ' ';
- else
- $exclusions .= ' AND cat_ID <> ' . intval($excat) . ' ';
- // TODO: Exclude children of excluded cats? Note: children are getting excluded
- }
- }
- }
- if (!empty($exclusions))
- $exclusions .= ')';
- $exclusions = apply_filters('list_cats_exclusions', $exclusions, $r );
- $where .= $exclusions;
- if ( $hide_empty && !$hierarchical ) {
- if ( 'link' == $type )
- $where .= ' AND link_count > 0';
- else
- $where .= ' AND category_count > 0';
- }
- if ( !empty($number) )
- $number = 'LIMIT ' . $number;
- else
- $number = '';
- $categories = $wpdb->get_results("SELECT * FROM $wpdb->categories WHERE $where ORDER BY $orderby $order $number");
- if ( empty($categories) )
- return array();
- // TODO: Integrate this into the main query.
- if ( $include_last_update_time ) {
- $stamps = $wpdb->get_results("SELECT category_id, UNIX_TIMESTAMP( MAX(post_date) ) AS ts FROM $wpdb->posts, $wpdb->post2cat, $wpdb->categories
- WHERE post_status = 'publish' AND post_id = ID AND $where GROUP BY category_id");
- global $cat_stamps;
- foreach ($stamps as $stamp)
- $cat_stamps[$stamp->category_id] = $stamp->ts;
- function stamp_cat($cat) {
- global $cat_stamps;
- $cat->last_update_timestamp = $cat_stamps[$cat->cat_ID];
- return $cat;
- }
- $categories = array_map('stamp_cat', $categories);
- unset($cat_stamps);
- }
- if ( $child_of || $hierarchical ) {
- $children = _get_category_hierarchy();
- if ( ! empty($children) )
- $categories = & _get_cat_children($child_of, $categories);
- }
- // Update category counts to include children.
- if ( $pad_counts )
- _pad_category_counts($type, $categories);
- // Make sure we show empty categories that have children.
- if ( $hierarchical && $hide_empty ) {
- foreach ( $categories as $k => $category ) {
- if ( ! $category->{'link' == $type ? 'link_count' : 'category_count'} ) {
- $children = _get_cat_children($category->cat_ID, $categories);
- foreach ( $children as $child )
- if ( $child->{'link' == $type ? 'link_count' : 'category_count'} )
- continue 2;
- // It really is empty
- unset($categories[$k]);
- }
- }
- }
- reset ( $categories );
- $cache[ $key ] = $categories;
- wp_cache_add( 'get_categories', $cache, 'category' );
- $categories = apply_filters('get_categories', $categories, $r);
- return $categories;
- }
- // Retrieves category data given a category ID or category object.
- // Handles category caching.
- function &get_category(&$category, $output = OBJECT) {
- global $wpdb;
- if ( empty($category) )
- return null;
- if ( is_object($category) ) {
- wp_cache_add($category->cat_ID, $category, 'category');
- $_category = $category;
- } else {
- $category = (int) $category;
- if ( ! $_category = wp_cache_get($category, 'category') ) {
- $_category = $wpdb->get_row("SELECT * FROM $wpdb->categories WHERE cat_ID = '$category' LIMIT 1");
- wp_cache_add($category, $_category, 'category');
- }
- }
- $_category = apply_filters('get_category', $_category);
- if ( $output == OBJECT ) {
- return $_category;
- } elseif ( $output == ARRAY_A ) {
- return get_object_vars($_category);
- } elseif ( $output == ARRAY_N ) {
- return array_values(get_object_vars($_category));
- } else {
- return $_category;
- }
- }
- function get_category_by_path($category_path, $full_match = true, $output = OBJECT) {
- global $wpdb;
- $category_path = rawurlencode(urldecode($category_path));
- $category_path = str_replace('%2F', '/', $category_path);
- $category_path = str_replace('%20', ' ', $category_path);
- $category_paths = '/' . trim($category_path, '/');
- $leaf_path = sanitize_title(basename($category_paths));
- $category_paths = explode('/', $category_paths);
- $full_path = '';
- foreach ( (array) $category_paths as $pathdir )
- $full_path .= ( $pathdir != '' ? '/' : '' ) . sanitize_title($pathdir);
- $categories = $wpdb->get_results("SELECT cat_ID, category_nicename, category_parent FROM $wpdb->categories WHERE category_nicename = '$leaf_path'");
- if ( empty($categories) )
- return NULL;
- foreach ($categories as $category) {
- $path = '/' . $leaf_path;
- $curcategory = $category;
- while ( ($curcategory->category_parent != 0) && ($curcategory->category_parent != $curcategory->cat_ID) ) {
- $curcategory = $wpdb->get_row("SELECT cat_ID, category_nicename, category_parent FROM $wpdb->categories WHERE cat_ID = '$curcategory->category_parent'");
- $path = '/' . $curcategory->category_nicename . $path;
- }
- if ( $path == $full_path )
- return get_category($category->cat_ID, $output);
- }
- // If full matching is not required, return the first cat that matches the leaf.
- if ( ! $full_match )
- return get_category($categories[0]->cat_ID, $output);
- return NULL;
- }
- // Get the ID of a category from its name
- function get_cat_ID($cat_name='General') {
- global $wpdb;
- $cid = $wpdb->get_var("SELECT cat_ID FROM $wpdb->categories WHERE cat_name='$cat_name'");
- return $cid?$cid:1; // default to cat 1
- }
- // Deprecate
- function get_catname($cat_ID) {
- return get_cat_name($cat_ID);
- }
- // Get the name of a category from its ID
- function get_cat_name($cat_id) {
- $cat_id = (int) $cat_id;
- $category = &get_category($cat_id);
- return $category->cat_name;
- }
- function cat_is_ancestor_of($cat1, $cat2) {
- if ( is_int($cat1) )
- $cat1 = & get_category($cat1);
- if ( is_int($cat2) )
- $cat2 = & get_category($cat2);
- if ( !$cat1->cat_ID || !$cat2->category_parent )
- return false;
- if ( $cat2->category_parent == $cat1->cat_ID )
- return true;
- return cat_is_ancestor_of($cat1, get_category($cat2->parent_category));
- }
- //
- // Private
- //
- function &_get_cat_children($category_id, $categories) {
- if ( empty($categories) )
- return array();
- $category_list = array();
- $has_children = _get_category_hierarchy();
- if ( ( 0 != $category_id ) && ! isset($has_children[$category_id]) )
- return array();
- foreach ( $categories as $category ) {
- if ( $category->cat_ID == $category_id )
- continue;
- if ( $category->category_parent == $category_id ) {
- $category_list[] = $category;
- if ( !isset($has_children[$category->cat_ID]) )
- continue;
- if ( $children = _get_cat_children($category->cat_ID, $categories) )
- $category_list = array_merge($category_list, $children);
- }
- }
- return $category_list;
- }
- // Recalculates link or post counts by including items from child categories
- // Assumes all relevant children are already in the $categories argument
- function _pad_category_counts($type, &$categories) {
- global $wpdb;
- // Set up some useful arrays
- foreach ( $categories as $key => $cat ) {
- $cats[$cat->cat_ID] = & $categories[$key];
- $cat_IDs[] = $cat->cat_ID;
- }
- // Get the relevant post2cat or link2cat records and stick them in a lookup table
- if ( $type == 'post' ) {
- $results = $wpdb->get_results("SELECT post_id, category_id FROM $wpdb->post2cat LEFT JOIN $wpdb->posts ON post_id = ID WHERE category_id IN (".join(',', $cat_IDs).") AND post_type = 'post' AND post_status = 'publish'");
- foreach ( $results as $row )
- ++$cat_items[$row->category_id][$row->post_id];
- } else {
- $results = $wpdb->get_results("SELECT $wpdb->link2cat.link_id, category_id FROM $wpdb->link2cat LEFT JOIN $wpdb->links USING (link_id) WHERE category_id IN (".join(',', $cat_IDs).") AND link_visible = 'Y'");
- foreach ( $results as $row )
- ++$cat_items[$row->category_id][$row->link_id];
- }
- // Touch every ancestor's lookup row for each post in each category
- foreach ( $cat_IDs as $cat_ID ) {
- $child = $cat_ID;
- while ( $parent = $cats[$child]->category_parent ) {
- if ( !empty($cat_items[$cat_ID]) )
- foreach ( $cat_items[$cat_ID] as $item_id => $touches )
- ++$cat_items[$parent][$item_id];
- $child = $parent;
- }
- }
- // Transfer the touched cells
- foreach ( (array) $cat_items as $id => $items )
- if ( isset($cats[$id]) )
- $cats[$id]->{'link' == $type ? 'link_count' : 'category_count'} = count($items);
- }
- function _get_category_hierarchy() {
- $children = get_option('category_children');
- if ( is_array($children) )
- return $children;
- $children = array();
- $categories = get_categories('hide_empty=0&hierarchical=0');
- foreach ( $categories as $cat ) {
- if ( $cat->category_parent > 0 )
- $children[$cat->category_parent][] = $cat->cat_ID;
- }
- update_option('category_children', $children);
- return $children;
- }
- ?>