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<?php class Foo { public function op($op, $f) { return $op($this->$f); } } $a = new Foo(); $a->f = [1, 17, 23, 9, 12, 3, 9, 2, 7, 68]; 'avg'; var_dump($a->op(function($x) { return array_sum($x) / count($x); }, 'f'));
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Creation of dynamic property Foo::$f is deprecated in /in/a2vTO on line 11 float(15.1)

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