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<?php class Super { protected $child; function setChild(Child $child){ $this->child = $child; if($child->getSuper() !== $this) $child->setSuper($this); } } class Child { protected $super; function setSuper(Super $super){ $this->super = $super; $this->super->addChild($this); } function getSuper(){ return $this->super; } } $super = new Super; $child = new Child; $super->addChild($child); var_dump($super); $super = new Super; $child = new Child; $child->setSuper($super); var_dump($super);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Call to undefined method Super::addChild() in /in/FvelE:32 Stack trace: #0 {main} thrown in /in/FvelE on line 32
Process exited with code 255.

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