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@ 2015-08-21T17:50:20Z

<?php
class foo
{
        private $bar;
        public function __construct()
        {
                $this->bar = new bar();
        }
        public function & __get($key)
        {
                $bar = $this->bar;
                return $bar;
        }
}
class bar { public $onBaz = []; }

$foo = new foo();
$foo->bar->onBaz[] = function() {};
var_dump($foo->bar->onBaz);

Output
Performance
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var_dump: documentation ( source)

preferences:dark modelive preview

60.18 ms | 402 KiB | 5 Q