3v4l.org

run code in 300+ PHP versions simultaneously
<?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)();
Output for 7.0.0 - 7.0.31, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
DO IT
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
Parse error: syntax error, unexpected 'do' (T_DO), expecting identifier (T_STRING) in /in/BFDL8 on line 7
Process exited with code 255.
preferences:
235.73 ms | 402 KiB | 362 Q