3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $x = implode(', ', array_slice(array(USA), -2)); var_dump($x);
based on pkuHY
Output for 7.2.0
Warning: Use of undefined constant USA - assumed 'USA' (this will throw an Error in a future version of PHP) in /in/Q5dmX on line 3 string(3) "USA"
Output for 4.3.0 - 7.1.10
Notice: Use of undefined constant USA - assumed 'USA' in /in/Q5dmX on line 3 string(3) "USA"