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<?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 => '');
$r = array_merge($defaults, $r);
$r['orderby'] = "cat_" . $r['orderby']; // restricts order by to cat_ID and cat_name fields
extract($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 );
$where .= $exclusions;
$having = '';
if ( $hide_empty ) {
if ( 'link' == $type )
$having = 'HAVING link_count > 0';
else
$having = 'HAVING category_count > 0';
}
$categories = $wpdb->get_results("SELECT * FROM $wpdb->categories WHERE $where $having ORDER BY $orderby $order");
if ( empty($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 )
$categories = & _get_cat_children($child_of, $categories);
return apply_filters('get_categories', $categories);
}
// Retrieves category data given a category ID or category object.
// Handles category caching.
function &get_category(&$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 {
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');
}
}
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('/', $category_paths);
foreach($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 = $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 $category->cat_name;
}
//
// Private
//
function &_get_cat_children($category_id, $categories) {
if ( empty($categories) )
return array();
$category_list = array();
foreach ( $categories as $category ) {
if ( $category->category_parent == $category_id ) {
$category_list[] = $category;
if ( $children = _get_cat_children($category->cat_ID, $categories) )
$category_list = array_merge($category_list, $children);
}
}
return $category_list;
}
?>
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