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<?php class Foo { private $cb; private $bar; public function __construct($cb) { $this->cb = $cb; unset($this->baz); } public function & __get($name) { if (! isset($this->$name)) { $cb = $this->cb; $cb(['bar' => & $this->bar]); } return $this->$name; } } $foo = new Foo(function ($properties) { $properties['bar'] = 'baz'; }); var_dump($foo->bar);
Output for git.master, git.master_jit, rfc.property-hooks
string(3) "baz"

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