Uploaded image width/height lmitation with createimagefromjpeg

[echomonkey]

Trying to implement limitation on image width/height of uploaded images by users of my site. The file indeed is being uploaded because ive been able to copy it from tmp to another directory and it exists. So the form, and upload works but imagecreatefromjpeg seems not to be a valid function???

if (ereg("[a-zA-Z/]+jpeg$", $_FILES['photo']['type']))
$img = imagecreatefromjpeg($_FILES['photo']['tmp_name']);
if (ereg("[a-zA-Z/]+gif$", $_FILES['photo']['type']))
$img = imagecreatefromgif($_FILES['photo']['tmp_name']);
$width = imagesx($img);
echo "<br>Width: ".$width;
unlink($_FILES['photo']['tmp_name']);

Should tell me the width of the uploaded image right? Not so it sdays function imagecreatefromjpeg not defined:

Fatal error: Call to undefined function: imagecreatefromjpeg() in ....... on line 15

Heres the php.net manual page for imagecreatefromjpeg

http://ca3.php.net/manual/en/function.imagecreatefromjpeg.php

Does this function realy exist? wheres the definition for it, isnt it an internal function?

[yelvington]

Go back to the manual page and click on the link to the first page of the "Image functions" section. Read the part that covers installation.

[echomonkey]

Thank you,

did that and discovered for windows I need the php_gd2.dll file, downloaded a prebuilt one and it works, well for jpeg anyway, not gif as I read about suport being removed.

Thankfully and coincidentialy I read the php.net home page and version php 4.3.2 now has readonly suport for gif.

thanks so much sometimes I get so tense I overlook things.