Url variable encoding/decoding

url_variable.php

<?php
class url_var
{
	/**
	 * encode variable for url
	 * @param $var
	 * @return string
	 */
	static function enc($var)
	{
		return urlencode(base64_encode(serialize($var)));
	}

	/**
	 * decode variable from url
	 * @param $var
	 * @return mixed
	 */
	static function dec($var)
	{
		return unserialize(base64_decode(str_replace(' ', '+', urldecode($var))));
	}
}