public static function encode($value, $key = null) { if ($key == null) { $key = Encryption::$skey; } else { $key = pack('H*', $key); } if (!$value) { return false; } $text = $value; $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB); $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND); $crypttext = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $text, MCRYPT_MODE_ECB, $iv); return trim(Encryption::safe_b64encode($crypttext)); }