example not working

While rating the package Image Flag Effect located at the page:
>
> http://www.phpclasses.org/browse/package/3157.html
>
> I realized the following information is not accurate:
>
> [X] Documentation is not provided
>
> [ ] Examples are not provided
>
> [ ] Test suite scripts are not provided
>
> Please verify and fix where needed.
>
> Maybe there is another (unmentioned) library that is required? --
> example does not work.
>
> *Fatal error*: Call to undefined function: imagecreatefromgif() in
> */usr/local/apache/htdocsi/intranetdev/PHP_TESTS/flag_effect/genflag.p
> hp*
> on line *47*

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You are using a version of the gd library that does not support gif images.
I advise getting another version.