SimpleXOR for PHP

SimpleXOR.php

<?php

/**
 * Created by PhpStorm.
 * User: syxc
 * Date: 15/7/10
 * Time: 17:29
 */
class SimpleXOR
{
    /*function simpleXor($data, $key)
    {
        $dataLen = strlen($data);
        $keyLen = strlen($key);
        for ($i = 0; $i < $dataLen; $i++) {
            $data[$i] = $data[$i] ^ $key[$i % $keyLen];
        }
        return $data;
    }

    function fixedXOR($one, $two)
    {
        $output = '';
        $limit = min(strlen($one), strlen($two));
        for ($i = 0; $i < $limit; $i++) {
            $output .= $one[$i] ^ $two [$i];
        }
        return $output;
    }*/

    private static function xor_encode($data, $key)
    {
        $dataLen = strlen($data);
        $keyLen = strlen($key);
        for ($i = 0; $i < $dataLen; $i++) {
            $data[$i] = $data[$i] ^ $key[$i % $keyLen];
        }
        return $data;
    }

    public static function decode($data, $key)
    {
        return self::xor_encode(base64_decode($data), $key);
    }

    public static function encode($data, $key)
    {
        return base64_encode(self::xor_encode($data, $key));
    }
}

xordemo.php

<?php

include_once("SimpleXOR.php");

$base_data = "muid=0f074dc8e1f0547310e729032ac0730b&conv_time=1422263664&client_ip=10.11.12.13&sign=8a4d7f5323fd91b37430d639e6f7371b";
$encrypt_key = "test_encrypt_key";

$data = SimpleXOR::encode($base_data, $encrypt_key);

if (isset($data)) {
    echo $data;
} else {
    echo "sorry!";
}

?>