On 01/20/2011 09:44 AM, Donovan Brooke wrote:
Hi Guys,
I'm waddling my way through database interaction and thought someone on
the list may already have a simple email checker that they'd like to
share...
you know, looking for the @ char and dots etc..
I did a quick search of the archives and found a couple elaborate
things.. but
I'm looking for something simple. This job will have trusted users and
the checker is more to help them catch mistakes when registering.
Thanks!,
Donovan
Well, I had created an email validator long ago, after a neat research
on Google, reading RFCs, etc.
I don't guarantee that it's without bugs, but it has been correct for me
in all valid & invalid email addresses I used for test.
Code:
<?php
function checkMail($mail) {
if(strlen($mail) <= 0) {
return false;
}
$split = explode('@', $mail);
if(count($split) > 2) {
return false;
}
list($username, $domain) = $split;
/*
* Don't allow
* Two dots, Two @
* !, #, $, ^, &, *, (, ), [, ], {, }, ?, /, \, ~, `, <, >, ', "
*/
$userNameRegex1 =
'/\.{2,}|@{2,}|[\!#\$\^&\*\(\)\[\]{}\?\/\\\|~`<>\'"]+/';
/*
* Username should consist of only
* A-Z, a-z, 0-9, -, ., _, +, %
*/
$userNameRegex2 = '/[a-z0-9_.+%-]+/i';
/*
* Domain cannot contain two successive dots
*/
$domainRegex1 = '/\.{2,}/';
/*
* Domain can contain only
* A-Z, a-z, 0-9, ., -,
*/
$domainRegex2 = '/[a-z0-9.-]+/i';
if(preg_match($userNameRegex1, $username) or
!preg_match($userNameRegex2, $username) or
preg_match($domainRegex1, $domain) or
!preg_match($domainRegex2, $domain) or
!checkdnsrr($domain, 'MX')) {
return false;
} else {
return true;
}
}
--
Regards,
Nilesh Govindarajan
Facebook: http://www.facebook.com/nilesh.gr
Twitter: http://twitter.com/nileshgr
Website: http://www.itech7.com
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