Links for form Validation class?

[PHPycho]

Hello forums!
I am searching for a good form validation class in php which i can use for my programming.
Do anybody know such links , posts? I would be very greatful if i got the good one.
Thanks in advance to all of you.

[phparion]

dig out http://www.phpclasses.org [phpclasses.org]

[edited by: dreamcatcher at 11:17 am (utc) on July 2, 2007]
[edit reason] Made link live [/edit]