[KLUG Members] Looking for PHP code snippet.

[Bruce Smith]

Not wanting to reinvent the wheel for a fairly standard piece of code
these days, I'm wondering if anyone can point me to an example snippet.

I want to verify that the data entered in a form was done by a real
person, and not a bot.  I'm looking to add a graphic containing random
numbers (and/or letters) that the person has to enter into a text box
before they press SUBMIT.  Usually the graphic is obscured with lines
and/or the characters are not evenly placed in the graphic.  (to mess
with bots using OCR type readers, I assume)

In the rare chance you haven't run across this, go to http://joker.com/
type a domain name in the "SEARCH WHOIS" text box, and click "GO".

Can anyone point me to some example PHP code to do this?  TIA!   :-)

 - BS