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run code in 300+ PHP versions simultaneously
<?php class Bar { function foobar() { echo 'test'; } } class Foo { public $bar; public function __call($method, $args) { call_user_func_array(array($this->bar, $method), $args); } } $foo = new Foo; $foo->bar = new Bar; var_dump(method_exists($foo, 'bar')); var_dump(is_callable(array($foo, 'bar')));

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