So, you’ve created a new user system but you need a way to see if an email address that someone has registered is genuine. This small script will do this by checking the email’s MX records.
<?php function CheckEmail($email,$record = 'MX'){ //define a function list($user,$domain) = split('@',$email); //split up the email into two variables $user & $domain if(checkdnsrr($domain,$record)){ //Use PHP function to check MX records return $email.': This MX record exists, I will accept this email as valid.'; //true }else{ return $email.': No MX record exists, Invalid email.'; //false } } echo CheckEmail("luke@luke-haynes.co.uk"); echo '<br>'; echo CheckEmail("fake@fakeemaildomain.old"); ?>
This code outputs:
luke@luke-haynes.co.uk: This MX record exists, I will accept this email as valid.
fake@fakeemaildomain.old: No MX record exists, Invalid email.
This is a very effective method of checking if an email is legitimate but the only way to fully prove that the email belongs to the user we need to send a confirmation email. (tutorial soon)
