image script help

I need to add a line break to my text area form field so the text entered will return on two seperate line when a return is used inside of the form.

The form can be located http://catchattention.com/picgen/test.html

I tried this bit of php
$text = ereg_replace("(rn|n|r)", "", $text);
to accomplish this but no dice.

If anyone can help I would be grateful

here is the code

<?
// Send png image header
header("Content-Type: image/png");

// Declare some vars

$text = $_GET['text'];
$tmp_font = $_GET['font'];
$fontsize = $_GET['fontsize'];
$tmp_fontcolor = $_GET['fontcolor'];
$tmp_bgcolor = $_GET['bgcolor'];

$text = ereg_replace("(rn|n|r)", "", $text);

// Set font
switch($tmp_font)
{
case "5cent":
$font = "fonts/5cent.ttf";
break;
case "airone":
$font = "fonts/airone.ttf";
break;
case "arial":
$font = "fonts/arial.ttf";
break;
case "comic":
$font = "fonts/comic.ttf";
break;
case "cour":
$font = "fonts/cour.ttf";
break;
case "georgia":
$font = "fonts/georgia.ttf";
break;
case "impact":
$font = "fonts/impact.ttf";
break;
case "lastninja":
$font = "fonts/lastninja.ttf";
break;
case "verdana":
$font = "fonts/verdana.ttf";
break;
case "xbox":
$font = "fonts/xbox.ttf";
break;
}

// Calc the text size
$box = ImageTTFbbox($fontsize, 0, $font, $text);

// Calc some props for the image
$width = $box[2] - $box[0];
$height = $box[1] - $box[7];
// 10 px empty space on each side
$imagewidth = $width + 30;
$imageheight = $height + 20;

// Create the image
$pic = ImageCreate($imagewidth, $imageheight);

// Set the colors
// Backgroundcolor
switch($tmp_bgcolor)
{
case "red":
$bgcolor = ImageColorAllocate($pic, 255, 0, 0);
break;
case "blue":
$bgcolor = ImageColorAllocate($pic, 0, 0, 255);
break;
case "green":
$bgcolor = ImageColorAllocate($pic, 0, 255, 0);
break;
case "yellow":
$bgcolor = ImageColorAllocate($pic, 255, 255, 0);
break;
case "orange":
$bgcolor = ImageColorAllocate($pic, 236, 116, 10);
break;
case "pink":
$bgcolor = ImageColorAllocate($pic, 255, 128, 255);
break;
case "lblue":
$bgcolor = ImageColorAllocate($pic, 0, 255, 255);
break;
case "grey":
$bgcolor = ImageColorAllocate($pic, 192, 192, 192);
break;
case "black":
$bgcolor = ImageColorAllocate($pic, 0, 0, 0);
break;
case "white":
$bgcolor = ImageColorAllocate($pic, 255, 255, 255);
break;
}

// Fontcolor
switch($tmp_fontcolor)
{
case "red":
$fontcolor = ImageColorAllocate($pic, 255, 0, 0);
break;
case "blue":
$fontcolor = ImageColorAllocate($pic, 0, 0, 255);
break;
case "green":
$fontcolor = ImageColorAllocate($pic, 0, 255, 0);
break;
case "yellow":
$fontcolor = ImageColorAllocate($pic, 255, 255, 0);
break;
case "orange":
$fontcolor = ImageColorAllocate($pic, 236, 116, 10);
break;
case "pink":
$fontcolor = ImageColorAllocate($pic, 255, 128, 255);
break;
case "lblue":
$fontcolor = ImageColorAllocate($pic, 0, 255, 255);
break;
case "grey":
$fontcolor = ImageColorAllocate($pic, 192, 192, 192);
break;
case "black":
$fontcolor = ImageColorAllocate($pic, 0, 0, 0);
break;
case "white":
$fontcolor = ImageColorAllocate($pic, 255, 255, 255);
break;
}

// Set the fontstart positions
$xstart = 10;
$ystart = $imageheight - 10;

// Write the text
ImageTTFText($pic, $fontsize, 0, $xstart, $ystart, $fontcolor, $font, $text);

// Finish image
ImagePng($pic);

// Clean up memory
ImageDestroy($pic);

?>