Posted by ShutEye on 10/18/07 19:55

> Hi,
>
> I'm using PHP 4.4.4. I want to block automatic submissions from
> spammers on our web site, so I'd like to use some PHP libraries that
> generate those image graphics and require the user to type the
> characters in the graphics. Do you have any recommendations on things
> you have used that are easy to implement and effective?
>
> Thanks for any advice or experiences you've had, - Dave

I use gdlib for easy picture manipulation.
Read more here:
http://dk2.php.net/manual/en/ref.image.php

Looks like gdlib is a part of php from v4.3

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