3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo1;
Output for 7.2.0 - 7.2.6
Warning: Use of undefined constant echo1 - assumed 'echo1' (this will throw an Error in a future version of PHP) in /in/8h6Ku on line 2
Output for 5.3.20 - 7.1.20
Notice: Use of undefined constant echo1 - assumed 'echo1' in /in/8h6Ku on line 2