[HaBo]

<?php

$uname  = $_POST["username"];
$header = $_POST["header"];
$text   = $_POST["usertext"];
$handle = $header .".txt";



$name="$handle";

$bol=file_exists($handle);

 if(!$bol){
    $dat = fopen( $name,"a" );
            fwrite($handle,$text);
            fclose($handle);

                print("<br>Vielen Dank!");
}else{
echo "Error: Beitrag fehlgeschlagen. Bitte kontaktiere den Webmaster.";
}