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<?php class User { public $profile; } class Profile { public $user; public function __construct(User $user) { $this->user = $user; $user->profile = $this; } } $user1 = new User(); $profile1 = new Profile($user); $user2 = new User(); $profile2 = new Profile($user); $profile1 == $profile2;
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $user in /in/bkZrq on line 22 Fatal error: Uncaught TypeError: Profile::__construct(): Argument #1 ($user) must be of type User, null given, called in /in/bkZrq on line 22 and defined in /in/bkZrq:13 Stack trace: #0 /in/bkZrq(22): Profile->__construct(NULL) #1 {main} thrown in /in/bkZrq on line 13
Process exited with code 255.

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