3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo whois;
Output for 7.2.0 - 7.3.0rc4
Warning: Use of undefined constant whois - assumed 'whois' (this will throw an Error in a future version of PHP) in /in/6nA7o on line 3 whois
Output for 4.3.0 - 7.1.20
Notice: Use of undefined constant whois - assumed 'whois' in /in/6nA7o on line 3 whois