Chatterbox Extensions.

lol.php

<?php
header("Content-type: text/plain");

$logfile = "log.txt";

$msg = $_POST['message'];
$contents = file_get_contents($logfile);

if(isset( $_POST['clear'] ) || isset( $_GET['clear'] )) {
     file_put_contents($logfile, "");
     echo $contents;
} elseif(!isset( $_POST['message'] )) {
    echo $contents;
} else {

     $contents .= "{$msg}\n";
     file_put_contents($logfile, $contents );
     echo "OK";
}
?>