3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php class x { const A = [ 'a' => 'b', 'c' => 'd']; public function __construct() { if (isset(self::A['a'])) { echo 'xxx'; } } } new x();
Output for 7.0.0 - 7.2.0
xxx
Output for 5.6.8 - 5.6.21
Fatal error: Cannot use isset() on the result of an expression (you can use "null !== expression" instead) in /in/q9EgT on line 8
Process exited with code 255.
Output for 5.4.9 - 5.5.35
Fatal error: Arrays are not allowed in class constants in /in/q9EgT on line 5
Process exited with code 255.
Output for 5.3.19 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/q9EgT on line 4
Process exited with code 255.