PHP Verification Codes CAPTCHA

Posted by Juddling on Stack Overflow See other posts from Stack Overflow or by Juddling
Published on 2010-04-08T12:34:58Z Indexed on 2010/04/08 13:13 UTC
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captcha

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php

I run a game website so I have many users logged in and they can do certain things once every two minutes.

I have a CAPTCHA system in places, and for some things it will always ask for a code, and for other things, it will ask once every 10 minutes.

I have had some players use the auto submit feature on Opera, and my CAPTCHA system does stop them.

My question is, how can I minimise the amount of times I am asking for a code, but still stop people using this auto-submit?

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