Online PHP editor | refs for hN9eJ

<?php class Obj { public function __construct($mix) { foreach ($mix as $k => $v) { $this->$k = $v; } } public function __toString() { $str = ''; foreach ($this as $k => $v) { $str = "$k => $v\n"; } return $str; } } class A { public $obj; public function setObj($obj) { $this->obj = $obj; } public function getObj() { return $this->obj; } function __sleep() { return ['test' => $this->obj]; } } function printA(A $a) { var_dump($a); serialize(debug_backtrace(0)); } $obj = new Obj(['hello'=>'there']); $a = new A(); $a->setObj($obj); var_dump($a->getObj()); printA($a); var_dump($a->getObj());