public static function Format ($str = '', array $args = []) {
		foreach ($args as $key => $value) {
			$pos = strpos($str, '{'.$key.'}');
			if ($pos !== FALSE)
				$str = substr($str, 0, $pos) . $value . substr($str, $pos + strlen($key) + 2);
		}
		return $str;
	}