WordPress/wp-admin/includes/taxonomy.php

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<?php
//
// Category
//
function category_exists($cat_name) {
$id = is_term($cat_name, 'category');
if ( is_array($id) )
$id = $id['term_id'];
return $id;
}
function get_category_to_edit( $id ) {
$category = get_category( $id, OBJECT, 'edit' );
return $category;
}
function wp_create_category($cat_name) {
if ( $id = category_exists($cat_name) )
return $id;
return wp_insert_category( array('cat_name' => $cat_name) );
}
function wp_create_categories($categories, $post_id = '') {
$cat_ids = array ();
foreach ($categories as $category) {
if ($id = category_exists($category))
$cat_ids[] = $id;
else
if ($id = wp_create_category($category))
$cat_ids[] = $id;
}
if ($post_id)
wp_set_post_categories($post_id, $cat_ids);
return $cat_ids;
}
function wp_delete_category($cat_ID) {
global $wpdb;
$cat_ID = (int) $cat_ID;
$default = get_option('default_category');
// Don't delete the default cat
if ( $cat_ID == $default )
return 0;
return wp_delete_term($cat_ID, 'category', "default=$default");
}
function wp_insert_category($catarr) {
global $wpdb;
extract($catarr, EXTR_SKIP);
if ( trim( $cat_name ) == '' )
return 0;
$cat_ID = (int) $cat_ID;
// Are we updating or creating?
if ( !empty ($cat_ID) )
$update = true;
else
$update = false;
$name = $cat_name;
$description = $category_description;
$slug = $category_nicename;
$parent = $category_parent;
$parent = (int) $parent;
if ( empty($parent) || !category_exists( $parent ) || ($cat_ID && cat_is_ancestor_of($cat_ID, $parent) ) )
$parent = 0;
$args = compact('name', 'slug', 'parent', 'description');
if ( $update )
$cat_ID = wp_update_term($cat_ID, 'category', $args);
else
$cat_ID = wp_insert_term($cat_name, 'category', $args);
if ( is_wp_error($cat_ID) )
return 0;
return $cat_ID['term_id'];
}
function wp_update_category($catarr) {
global $wpdb;
$cat_ID = (int) $catarr['cat_ID'];
if ( $cat_ID == $catarr['category_parent'] )
return false;
// First, get all of the original fields
$category = get_category($cat_ID, ARRAY_A);
// Escape data pulled from DB.
$category = add_magic_quotes($category);
// Merge old and new fields with new fields overwriting old ones.
$catarr = array_merge($category, $catarr);
return wp_insert_category($catarr);
}
//
// Tags
//
function get_tags_to_edit( $post_id ) {
global $wpdb;
$post_id = (int) $post_id;
if ( !$post_id )
return false;
$tags = wp_get_post_tags($post_id);
if ( !$tags )
return false;
foreach ( $tags as $tag )
$tag_names[] = $tag->name;
$tags_to_edit = join( ', ', $tag_names );
$tags_to_edit = attribute_escape( $tags_to_edit );
$tags_to_edit = apply_filters( 'tags_to_edit', $tags_to_edit );
return $tags_to_edit;
}
function tag_exists($tag_name) {
return is_term($tag_name, 'post_tag');
}
function wp_create_tag($tag_name) {
if ( $id = tag_exists($tag_name) )
return $id;
return wp_insert_term($tag_name, 'post_tag');
}
?>