How to validate an email address with PHP

validate-email.php

<?php
function validEmail($email){
// Check the formatting is correct
if(filter_var($email, FILTER_VALIDATE_EMAIL) === false){
return FALSE;
}

// Next check the domain is real.
$domain = explode("@", $email, 2);
return checkdnsrr($domain[1]); // returns TRUE/FALSE;
}

// Example
validEmail('[email protected]'); // Returns TRUE
validEmail('[email protected]'); // Returns FALSE
?>