OhDns is a DNS record lookup library for PHP.
See test.php for examples of retrieving DNS records by type.
Additionally, this library provides a more advanced email validation by verifying the MX records associated to the domain actually exist.
<?php
$valid = \OhDns\Validators\EmailAddressValidator::isValid(
'joe@example.com'
);
if ($valid) {
echo ' YES: joe@example.com is a valid email address.';
} else {
echo ' NO: joe@example.com is NOT a valid email address.';
}composer require rogerthomas84/ohdns