3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $s = array('a', 'b', 'c'); $s = array_map('strtoupper', $s); var_dump($s);
based on fjKb4
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(3) { [0]=> string(1) "A" [1]=> string(1) "B" [2]=> string(1) "C" }