3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php [$a => $b];
Output for 5.4.1 - 7.2.0
Notice: Undefined variable: b in /in/YV4Dr on line 3 Notice: Undefined variable: a in /in/YV4Dr on line 3
Output for 5.3.18 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/YV4Dr on line 3
Process exited with code 255.