To check if email is used already.

[StalKer]

Hi!
Im trying to make this gb act as an interest check. So i want people to post for their interest, but only one time per person. I dont think its hard to let the php check if that email is already in the database.
But i dont know how to write it.

Ive searched alot for it, but i guess its not common to have this function in a gb

[Ronald Wernecke]

it is just a simple sql query against the users table, where you check for e-mail address.
if you receive a record, the email address exists.

[StalKer]

Yea, i know. But the problem is i dont know how to write that, cuz i never wrote anything from start before.