3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class C { function __invoke() {} } $c = new C; var_export(is_callable($c));
Output for 5.3.0 - 5.6.28, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
true
Output for 4.3.0 - 5.2.17
false