URLify::init PHP Method

    private static function init($language = "")
    {
        if (count(self::$map) > 0 && ($language == "" || $language == self::$language)) {
            return;
        }
        /* Is a specific map associated with $language ? */
        if (isset(self::$maps[$language]) && is_array(self::$maps[$language])) {
            /* Move this map to end. This means it will have priority over others */
            $m = self::$maps[$language];
            unset(self::$maps[$language]);
            self::$maps[$language] = $m;
        }
        /* Reset static vars */
        self::$language = $language;
        self::$map = array();
        self::$chars = '';
        foreach (self::$maps as $map) {
            foreach ($map as $orig => $conv) {
                self::$map[$orig] = $conv;
                self::$chars .= $orig;
            }
        }
        self::$regex = '/[' . self::$chars . ']/u';
    }