PHP Captcha without session

Question

Ok, here is an issue: in the project i\'m working on, we can\'t rely on server-side sessions for any functionality.

The problem is that common captcha solutions fro

Answer 1

You could try storing a bunch of captcha codes in a database. Alternatively, theres a nice discussion on alternate captcha methods here: Practical non-image based CAPTCHA approaches?

some pretty interesting techniques really, have a read through.