Color to Grayscale Image

All I get is garbage symbols

[neophyte]

Hello All -

I'm trying to build a little function that would take a full-color image and turn it into a grayscale image. Looking at the php manual makes this look very simple - now I'm not so sure.

When I run the script, I don't get any errors (as I'm use to seeing errors, anyway) but what I do get is a half-page of garbage symbols (i.e. ÿØÿà�JFIF�

��
�
��ÿþ�>CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), default quality ÿÛ�C�    $.' ",#(7)... and so on).

Here's my function and it's caller. What am I missing?

Neophyte

**********************

function imageGray($fileDir, $fileName)
{

$fullPath = $fileDir . '/' . $fileName;

$im = imagecreatefromjpeg($fullPath);

imagefilter($im, IMG_FILTER_GRAYSCALE);

imagejpeg($im);

imagedestroy($im);
}

$fileDir = 'thumb';
$fileName = 'alanhead.jpg';

imageGray($fileDir, $fileName);

[coopster]

You need to send out the correct content type in your headers first.

[neophyte]

Coopster -

Not-so-minor oversight; got it now. Thanks!

Neophyte