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<?php class a { private $b; function __construct($b = NULL) { if ($b) $this->b = $b; else $this->b = new b($this); $this->b->test(); } public function test() { echo ($this->b !== NULL) ? __METHOD__.":: b not NULL\n" : __METHOD__." :: b NULL\n"; } } class b { private $a; function __construct($a = NULL) { if ($a) $this->a = $a; else $this->a = new a($this); $this->a->test(); } public function test() { echo ($this->a !== NULL) ? __METHOD__.":: a not NULL\n" : __METHOD__." :: a NULL\n"; } } new a;
Output for git.master, git.master_jit, rfc.property-hooks
a::test :: b NULL b::test:: a not NULL

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