[SOLVED] Quick Validation Question

[JSHINER]

I have a form where a user enters a username. I want it to kick back an error if they enter their email address. How can I get it to see if a "@" or "." is in the entry?

[rhodesa]

first, for usernames, I usually use their email anyways. keeps things simpler IMO

 

but, if you want to make sure they don't use their email, just make it so their username has to be alphanumeric and underscores. in php you can use

if(!preg_match('/^\w+$/',$email)) die("Invalid username");

[JSHINER]

Thanks!