Check if field only contains alphanumerics (no spaces or special chars)

[account8226]

Hello,

I am trying to validate one of my fields. In my datawritter I am calling a validating function, that call a method 'validate' in my model.

if (preg_match('/[^a-zA-Z0-9_]/', $username)) return false;

Why is that not working ? It's always returning false...

 

[account8226]

Solved it, was just passing out the wrong variable This preg match function works.

 

[Jaxel]

I recommend using # instead of /.

preg_match('#[^\w]#', $username)