Code:
<?php
function validate_email ($email) {
$regex='/^[\w!#$%&\'*+\/=?^`{|}~.-]+@(?:[a-z\d][a-z\d-]*(?:\.[a-z\d][a-z\d-]*)?)+\.(?:[a-z]+)$/iD';
if (preg_match($regex, $email, $m)) { return $m[0]; }
return false;
}
var_dump(validate_email('[email protected]'));
?>