help making a better email check

m3rajk posted this at 03:15 — 18th January 2004.

Joined: Jul 2003

current: preg_match('/^[\w\.\-]+@[\w\.\-]+\.\w\w\w?$/', $email)

a friend typoed nrt for net. so i figure even with two feilds ineed a better check. i want to allow the two letter country codes and all the 3/4 letter domains (i don't see anyone using museum)
does anyone know a place that has an up to date list? will the others with prel reg exp skim this quickly and make sure i didn't screw up (i find that i have a tendency to make minor mistakes, if i did it should be caught by one of you i expect... don't have a way to test this until i can get a friend to try it, which might be after you look at it)

new: preg_match('/^[\w\.\-]+@[\w\.\-]+\.(\w\w|biz|com|org|gov|net|info)$/', $email)

POSIX. because a stable os that doesn't have memory leaks and isn't buggy is always good.

m3rajk posted this at 07:16 — 18th January 2004.

They have: 461 posts

Joined: Jul 2003

http://forums.devnetwork.net/viewtopic.php?t=16863

ROB posted this at 05:10 — 19th January 2004.

They have: 447 posts

Joined: Oct 1999

i've been using this forever:

function validate_email(&$email) {
	if(	preg_match("/(@.*@)|(\.\.)|(@\.)|(\.@)|(^\.)/",$email) ||
		!preg_match("/^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z]{2,3}|[0-9]{1,3})(\]?)$/",$email)
	) return 0;
	return 1;
}

Mark Hensler posted this at 07:20 — 20th January 2004.

He has: 4,048 posts

Joined: Aug 2000

What about IPs? I'm pretty sure you can email a user@IP.

Read section 4.1.3 of RFC 2821.

m3rajk posted this at 22:27 — 20th January 2004.

They have: 461 posts

Joined: Jul 2003

thanx mark. i missed that. i got a list of top levels and added those to check against that. i knew about the two letters and to make that easier used \w\w, but apparently \w\w\d? is what i should have there.

POSIX. because a stable os that doesn't have memory leaks and isn't buggy is always good.