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<?php class A{ public function __construct(){ $b = new B(); $a = $this; $b->a[] = function() use($a){ $a->x(); }; $b->callA(); } private function x(){ var_dump('a'); } } class B { public $a; public function callA(){ $this->a[0](); } } $a = new A();
Output for git.master, git.master_jit, rfc.property-hooks
string(1) "a"

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