3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = ['teste' => 'teste']; $key = null; var_dump($a[$key] ?? ($key === null ? $a : null));
based on svMq8
Output for 7.0.0 - 7.2.0
array(1) { ["teste"]=> string(5) "teste" }
Output for 5.4.10 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/rfcKk on line 5
Process exited with code 255.
Output for 5.3.20 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/rfcKk on line 3
Process exited with code 255.