[RESOLVED] preg_match()

[brendan2b]

So I have read around and I have my validation conditional as

if(preg_match('/[^a-z0-9]/i', $userName)
{
$errors = 1;
$error .= "* Your username can only contain letters and numbers *";
}

What would I add to the preg_match to include underscores with that?

This is probably not right, but that is why I am posting.

preg_match('\[^a-z0-9]\_\/i', $userName)

Thanks.

[NogDog]

if(preg_match('/\W/', $userName))

'\w' means any word character: a-zA-Z0-9_
'\W' means any character that is NOT a word character

[NogDog]

PS: Just FYI, to use your original method, you would simply add the underscore to the character class:

if(preg_match('/[^a-z0-9_]/i', $userName)

[brendan2b]

Wow thanks a lot, works great.