These are my PHP/MySQL projects and assignments.

eregs

Here are some useful PHP eregs

Email:
eregi("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$", $email))

xxxxx@yyyyyy.zz or .zzz

Postal Code:
...more...

Did this help or was it useful?? Are there errors??
Please post feed back so I can change them or know that I have helped.