RE: [PHP-DB] E-mail address verification From: Beau Lebens (B.Lebens <email protected>)
Date: 06/23/02

also, you might like to do some client-side validation before sending it to
the server, in which case you can use somehting like
http://www.dentedreality.com.au/jsvalidation/

HTH

Beau

// -----Original Message-----
// From: Gary.Every <email protected>
// [mailto:Gary.Every <email protected>]
// Sent: Friday, 21 June 2002 12:00 AM
// To: xbite <email protected>; php-db <email protected>
// Subject: RE: [PHP-DB] E-mail address verification
//
//
//
//
//
// I do it like this:
//
//
// if
// (eregi("^[a-z0-9]+([\.%!][_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*$",
// $email))
// {
// list($user, $host) = explode("@", $email);
// if ( !checkdnsrr($host, "MX") )
// return TRUE;
// }
// else
// {
// return FALSE;
// }
// }
//
// As you can see, the email can "look" right, but domain isn't
// valid. So you
// can check DNS record for MX domain.
// Next step is to connect to mail server and verify user, but
// usualy that
// takes time and it's better to send some kind of auth code to
// that mail and
// if user conforms it, you can use it...
//
// This worked very well. For any of you out there that are
// looking for a
// simple verification with host dns lookup, here it is!!!
//
// For a more comprehensive "class" check here, thanks to Manuel Lemos
//
// http://www.phpclasses.org/emailvalidation
//
// 

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