3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php const FOO = [1] + [2 => 3];
based on s2pk6
Output for 5.6.8 - 7.2.0
Output for 5.4.0 - 5.5.35
Fatal error: Arrays are not allowed as constants in /in/rKnC6 on line 3
Process exited with code 255.