3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function foo(callable $foo) { $foo(); } class A { public function __invoke() { echo 'foo'; } } foo(new A);
Output for 5.6.30, hhvm-3.18.5 - 3.22.0, 7.0.30 - 7.3.0beta1
foo