get_category_children() WordPress Function

function get_category_children( $id, $before = '/', $after = '', $visited = array() ) {
	_deprecated_function( __FUNCTION__, '2.8.0', 'get_term_children()' );
	if ( 0 == $id )
		return '';

	$chain = '';
	/** TODO: Consult hierarchy */
	$cat_ids = get_all_category_ids();
	foreach ( (array) $cat_ids as $cat_id ) {
		if ( $cat_id == $id )
			continue;

		$category = get_category( $cat_id );
		if ( is_wp_error( $category ) )
			return $category;
		if ( $category->parent == $id && !in_array( $category->term_id, $visited ) ) {
			$visited[] = $category->term_id;
			$chain .= $before.$category->term_id.$after;
			$chain .= get_category_children( $category->term_id, $before, $after );
		}
	}
	return $chain;
}
Uses	Description
wp-includes/deprecated.php:get_category_children()	Retrieve category children list separated before and after the term IDs.
wp-includes/deprecated.php:get_all_category_ids()	Retrieves all category IDs.
wp-includes/category.php:get_category()	Retrieves category data given a category ID or category object.
wp-includes/functions.php:_deprecated_function()	Mark a function as deprecated and inform when it has been used.
wp-includes/load.php:is_wp_error()	Checks whether the given variable is a WordPress Error.