3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $s1 = "a"; $s2 = "b"; $s3 = null; $s = implode(", ", array($s1, $s2, $s3)); echo trim($s, " ,") ?>
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
a, b
Output for hhvm-3.10.0

Process exited with code 137.