API_Route::buildTree PHP Метод

    private static function buildTree($deep, $array, &$tree, $callback)
    {
        if ($deep == count($array) - 1) {
            self::buildCallback($tree, $callback);
            // Register callback in the deepest path.
            return;
        }
        if (self::$debug) {
            echo 'deep = ' . $deep . ', $array[$deep] = ' . $array[$deep] . "\n";
        }
        $val = $array[$deep];
        $childTree =& $tree;
        if (!isset($tree[$val])) {
            $tree[$val] = array();
        }
        $childTree =& $tree[$val];
        self::buildTree($deep + 1, $array, $childTree, $callback);
        // To build deeper path
        return true;
    }