Checking valid Email Addresses using RegExp (and?)

ReSpawN · 12-30-2007, 10:32 PM

Hey guys,

For my CMS, I am using the Revised RegEx function from Matt83. Thanks a bunch Matt! Love the work, also thanks to Salathe for the creds and Adam for the sharp eye noticing the {3,3} - {3}. Notice that I am -NOT- a RegEx specialist. To be honest, I suck at it.

Since it's for my CMS, it's gotta be pretty fool-fail proof. I am going to link it to a dns record database using the functions supplied by PHP itself. (defined in the installation to use it. IF it takes too long, you can't use it)

Now the hard part. The RegEx. I want to use it everywhere, so it has to be 100% (or at least top notch) perfect.

Currently I use this RegEx

PHP Code:


			
preg_match('/^[^\W][a-zA-Z0-9_]+(\.[a-zA-Z0-9_]+)*\@[a-zA-Z0-9_]+(\.[a-zA-Z0-9_]+)*\.[a-zA-Z]{2,4}$/', $string)

Next to that, I am, ofcourse, going to split it with explode() on the @ and then check the subdomain. (example;
info@markernst.com » markernst.com)

Do you guys think this is pretty safe?