IanD — Thu, 02 Nov 2006 14:49:36 +0000

Ofcourse the regex doesn't confirm that the address actually exists, but it does help prevent people from making mistakes or purposefully entering a invalid email. It's not 100%, but very few things are. Used in addition to sending a confirmation e-mail it is usefull.

Mark Hensler — Thu, 02 Nov 2006 07:02:53 +0000

DDoSAttack;209456 wrote: That is not always what you would be using this for...

I use it more for making sure that a user hasn't mistyped an email address.

Just because the email is valid syntax-wise doesn't mean it isn't mistyped. "a@b.cd" is valid, but it isn't mine.... That's why I prefer to use email confirmation.

IanD — Wed, 25 Oct 2006 14:03:18 +0000

DDoS, I added your regex to the test and it didn't do as well as the one I listed. You can check out the detailed results on the page (yours is at the bottom).

Which addresses that I have marked as invalid do you think are valid?

DDoSAttack — Wed, 25 Oct 2006 00:02:26 +0000

Mark Hensler;209423 wrote: Best email validation is simply to send an email to the addy with a confirmation link. Shazam!

That is not always what you would be using this for...

I use it more for making sure that a user hasn't mistyped an email address.

Mark Hensler — Tue, 24 Oct 2006 19:09:29 +0000

Best email validation is simply to send an email to the addy with a confirmation link. Shazam!

DDoSAttack — Tue, 24 Oct 2006 14:49:09 +0000

I use preg_match instead of eregi. So my validation script looks like...

<?php
preg_match('/^[^\x00-\x20()<>@,;:\\\".[\]\x7f-\xff]+(?:\.[^\x00-\x20()<>@,;:\\\".[\]\x7f-\xff]+)*\@[^\x00-\x20()<>@,;:\\\".[\]\x7f-\xff]+(?:\.[^\x00-\x20()<>@,;:\\\".[\]\x7f-\xff]+)+$/i', $email)
?>

also believe it or not some of those email addys that you tested and said are supposed to be invalid are actually valid according to standard

IanD — Tue, 24 Oct 2006 14:32:44 +0000

I tried to add that to my tester but couldn't get it working. I kept getting this error from PHP:

Warning: eregi(): REG_BADRPT

Is that meant to be used in JavaScript or something? Can you modify it to make it work in PHP?

DDoSAttack — Mon, 23 Oct 2006 23:52:19 +0000

I haven't tried your regex but I know this is the most perfect email validation script that I have ever used...

/^[^\x00-\x20()<>@,;:\\".[\]\x7f-\xff]+(?:\.[^\x00-\x20()<>@,;:\\".[\]\x7f-\xff]+)*\@[^\x00-\x20()<>@,;:\\".[\]\x7f-\xff]+(?:\.[^\x00-\x20()<>@,;:\\".[\]\x7f-\xff]+)+$/i'