thumbanail create function error with php version 5.2.9

My servers php version is 5.2.9,

i'm uploading some pictures into my site, i want to create thumbnails of that images,

but none of the thumbnail create functions are working in my site.

l开发者_开发百科ike imagecreatefromjpeg(), imagecreatetruecolor(),

everything is saying undefined function..

what will be reason for this.

Is the functions are not supported in php version 5.2.9

How can i solve this problem.

Can anyone help to fix this issue.

Thanks in Advance

It looks like the GD library is not installed. Are you on a shared host, or an own server?