3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php error_reporting(-1); define('SINGLE_QUOTE', '\''); define('COMMA', ','); echo SINGLE_QUOTE, hello, COMMA, world, SINGLE_QUOTE;
Output for 7.2.0 - 7.3.0rc4
' Warning: Use of undefined constant hello - assumed 'hello' (this will throw an Error in a future version of PHP) in /in/IqQNe on line 8 hello, Warning: Use of undefined constant world - assumed 'world' (this will throw an Error in a future version of PHP) in /in/IqQNe on line 8 world'
Output for 4.3.0 - 7.1.20
' Notice: Use of undefined constant hello - assumed 'hello' in /in/IqQNe on line 8 hello, Notice: Use of undefined constant world - assumed 'world' in /in/IqQNe on line 8 world'