Call to undefined function: imagecreatefromjpeg()

Does anybody know why I could be getting the error:

when i use the code:

$im2 = imagecreatefromjpeg($picture_location);

I am running PHP 4.3.0 if that makes a difference.

Thanks for the help.

It seems to me to remember that you have to enable the GD Library to rnable that kind of functions

How do I go about enabling the GD functions?

Depends on your OS. If you are using windows you simply uncomment the gd line in your php.ini

i'm having the same problem. however, after uncommenting the extension=php_gd.dll in php.ini, it gives me the following error upon starting apache:

The procedure entity point zend_list_find could not be located in the dynamic link library php4ts.dll.

i'm unsure where to go from there.

thanks