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<?php class Foo { public $references; private $bar; public function __construct() { $this->references = ['bar' => & $this->bar]; unset($this->baz); } public function & __get($name) { if (! isset($this->$name)) { var_dump('initialized'); $this->$name = 'initialized - ' . $name; } return $this->$name; } } $foo = new Foo(); var_dump($foo->references); $foo->references['bar'] = 'bar pre-initialized'; var_dump($foo->bar);
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { ["bar"]=> &NULL } string(19) "bar pre-initialized"

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