strstr Question

I am currently writing a piece of code that when a user enters in their email address it will check it for validity. In this instance they are supposed to type in user@domain.com But if they just type in user I want it to add @domain.com at the end by default. This is the piece of code I have so far, but it does not seem to be working... if (strstr($email, '@')) { continue; } else { $email = $email . "@domain.com"; } I've been all over the documentation but I am obviously missing something. If anyone could be of any assistance I would greatly appreciate it. Thanks you. -- Erich Zigler I prefer rogues to imbeciles, because they sometimes take a rest. -- Alexandre Dumas (fils)