Compress GIF Images Quality in PHP?

Question

How would one compress GIF image file in PHP5 ?

I know that its possible to do with JPG like this imagejpeg($resource, $filename, $quality) according to http://us.php.net/manual/en/function.imagejpeg.php

Answer 1

JPG is a lossy compression. This means that you can use "quality parameter" to adjust size / quality ratio.

GIF is a lossless compression, you cannot get better compression by adjusting quality.

To create a GIF image use imagegif(...)
http://us.php.net/manual/en/function.imagegif.php