TalkPHP - errors help

ok so i have been plodding a long with a big php file now and input some stuff...

PHP Code:


		
			
<?php

if(isset($_POST['setpaste']) && !empty($_POST['setpaste'])) {

$thehead = $_REQUEST["addpastehead"];

$thebody = $_REQUEST["addpaste"];

//replace blank lines for the break tag

$thebody = preg_replace('/[\n\r]+/', '<br />', $thebody);

$randnumb = "";

$stringrandom = "";

function genRandomString() {

    $length = 30;

$characters = "0123456789abcdefghijklmnopqrstuvwxyz";

    for ($p = 0; $p < $length; $p++) {

        $stringrandom .= $characters[mt_rand(0, strlen($characters))];

    }

    return $stringrandom;

}

$randnumb = genRandomString();

$randnumb2 = genRandomString();



$thefilename = 'paste_boardnum1'. $randnumb . $thehead . $randnumb2 . '.php';

$checkfile = 'pasteboard/' . $thefilename;

if (file_exists($checkfile)) {

    die ('There was an error in the process... Please try again');

}

//write new note

$myFile = "pasteboard/" . $thefilename;

$fh = fopen($myFile, 'w') or die("can't open file");

$stringData = '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>' . $thehead . '</title>

</head>



<body>' . $thebody . '</body>

</html>';

fwrite($fh, utf8_encode($stringData));

fclose($fh);

//header( 'refresh: 5; url=pasteboard/' . $thefilename );

echo '<a href="pasteboard/' . $thefilename . '">View file</a>';

}

?>

and great this worked!
kind of..

it puts the file alright infact it out puts everything alright from what i can see only when the data is submitted and this code is extracted it outputs these errors...

Notice: Undefined variable: stringrandom in E:\domains\s\sb0t.tentun.co.uk\user\htdocs\index.p hp on line 610

Notice: Uninitialized string offset: 36 in E:\domains\s\sb0t.tentun.co.uk\user\htdocs\index.p hp on line 610

Notice: Undefined variable: stringrandom in E:\domains\s\sb0t.tentun.co.uk\user\htdocs\index.p hp on line 610

Notice: Uninitialized string offset: 36 in E:\domains\s\sb0t.tentun.co.uk\user\htdocs\index.p hp on line 610

line 610 which would be the } after return $stringrandom;

Anyone got any idea what would be the fix to this to where i have gone wrong? much appreciated thanks ^^