3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = ['a'=>1, 'b'=>2]; foreach ($a as $key=>$value) { print($key); $a['b'] = 3; }
Output for 5.4.0 - 7.2.0
ab
Output for 5.3.18 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/VVSLF on line 3
Process exited with code 255.