3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php class Foo { public $callable; public function do() { return ($this->callable)(); } } class Bar { public function __invoke() { echo 'DO IT'; } } $foo = new Foo; $foo->callable = new Bar; ($foo->callable)();
based on 351J4
Output for 7.0.0 - 7.2.0
DO IT
Output for 5.4.0 - 5.6.28
Parse error: syntax error, unexpected 'do' (T_DO), expecting identifier (T_STRING) in /in/BFDL8 on line 7
Process exited with code 255.
Output for 5.3.19 - 5.3.29
Parse error: syntax error, unexpected T_DO, expecting T_STRING in /in/BFDL8 on line 7
Process exited with code 255.