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<?php class Foo { private $bar; public function __construct($bar) { $this->bar = $bar; } public function do_foo() { $bar = $this->bar; $bar(); } } class Bar { public function __invoke() { $this->do_bar(); } public function do_bar() { echo __METHOD__, "\n"; } } $foo = new Foo(new Bar()); $foo->do_foo();
Output for git.master, git.master_jit, rfc.property-hooks
Bar::do_bar

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