Hmmm? I agree with Nona'a original post I have the same problem. I tried several things but none of them worked!!
I uncommented the extension section removing the ; symbol in my php.ini.
 Now it reads extension=php_gd.dll
 I checked my c:/php/extensions dir and there it is, the (php_gd.ll) file
Also on another subject my include_path reads
yet the browser seems to be taking ages to load (rather not to load) the desired page.
How can I activate the GD library or get phpo to load the php_gd.dll. Ther is another file in my c:/php/dll folder (gds32.dll). This all other files I have copied to my windows dir as well as my system and system32 folders and still I get the error of undefined function call to imagecreate.
I even edit my php script and renamed the call to the function from $im = imagecreate($width, $height) to $im = ImageCreate($width, $height) and still getting the undefined error.
Nona it seems we have the same text book! lol.
My platform is:
Windows 98 second endition