3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = ['teste' => 'teste']; $key = 'teste'; var_dump($a[$key] ?? ($key === null ? $a : null));
based on Bf8Dv
Output for 7.0.0 - 7.2.0
string(5) "teste"
Output for 5.4.10 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/svMq8 on line 5
Process exited with code 255.
Output for 5.3.20 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/svMq8 on line 3
Process exited with code 255.