3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php /*function add($a, $b){ return $a + $b; } echo add(2,3); function subtract ($a, $b){ return $a - $b; } echo subtract(5,4);*/ function concatenate($a, $b){ return $a . $b; } echo concatenate('Hello', 'Wie');
based on 9GGGj
Output for 4.3.0 - 7.2.0
HelloWie