3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?= hello . world ?>
based on KFl7a
Output for 7.2.6 - 7.3.0beta1
Warning: Use of undefined constant hello - assumed 'hello' (this will throw an Error in a future version of PHP) in /in/9W4DQ on line 1 Warning: Use of undefined constant world - assumed 'world' (this will throw an Error in a future version of PHP) in /in/9W4DQ on line 1 helloworld
Output for 5.5.0 - 7.1.20
Notice: Use of undefined constant hello - assumed 'hello' in /in/9W4DQ on line 1 Notice: Use of undefined constant world - assumed 'world' in /in/9W4DQ on line 1 helloworld