PHP CAPTCHA decoding

Is there any sort of library for PHP to decode simple CAPTCHA's!

>>9
I don't know of anything for PHP, and any solution is  going to be limited to a specific piece of captcha software, but here's a greasemonkey script for decoding megauploads captchas that works pretty good^[1], you could also check out this^[2], but I can't vouch for it.
<sub>--
1. http://herecomethelizards.co.uk/mu_captcha/
2. http://caca.zoy.org/wiki/PWNtcha</sub>