Yep! It's called captcha. There is a PEAR package Text/CAPTCHA, and also you 
can find some other classes at phpclasses.org
Good luck!

Sincerely,
Rosty Kerei <[EMAIL PROTECTED]>

"Clive" <[EMAIL PROTECTED]> wrote in message 
news:[EMAIL PROTECTED]
> Hi
> does any one have a class/function to generate those security code images.
>
> Yhe ones that you see on website that you must enter to submit a form
>
> thanks
>
> clive 

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