class sagepay {

    public $encryptPassword = 'djgktifhtjriekfj';

    protected function encryptAndEncode($strIn) {
		$strIn = $this->pkcs5_pad($strIn, 16);
		echo $strIn;
		return "@".bin2hex(mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $this->encryptPassword, $strIn, MCRYPT_MODE_CBC, $this->encryptPassword));
	}

    protected function pkcs5_pad($text, $blocksize)	{
		$pad = $blocksize - (strlen($text) % $blocksize);
		return $text . str_repeat(chr($pad), $pad);
	}
}