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<?php $domain = 'non-existant-domain-name.com'; if (gethostbyname($domain) == $domain) { var_dump(checkdnsrr($domain)); var_dump(getmxrr($domain, $mxhosts)); var_dump($mxhosts); } else { echo 'Domain exists'; }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.21, 7.4.0 - 7.4.10, 8.0.0alpha1 - beta3
bool(false) bool(false) array(0) { }