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<?php class Item { public static function &newWithParent(Item &$parent) { $item = new Item(); $item->parent = &$parent; return $item; } private $parent; public function &getParent() { return $this->parent; } } $item = Item::newWithParent(Item::newWithParent(Item::newWithParent(new Item()))); // Basically it's this now: {"parent":{"parent":{"parent":{"parent":null}}}} // I want to set that null value $list = $item; do { $prev = &$item; $item = $item->getParent(); if ($item->getParent() === null) { $prev =& Item::newWithParent($item); break; } } while (true); var_dump($list);
Output for git.master, git.master_jit, rfc.property-hooks
Notice: Only variables should be passed by reference in /in/6dJ1U on line 19 object(Item)#4 (1) { ["parent":"Item":private]=> object(Item)#3 (1) { ["parent":"Item":private]=> object(Item)#2 (1) { ["parent":"Item":private]=> object(Item)#1 (1) { ["parent":"Item":private]=> NULL } } } }

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