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<?php class A { } class B extends A { public self $instOfSelf; public parent $instOfParent; } $b = new B(); $b->instOfParent = new B(); # Allowed var_dump($b); $b->instOfParent = new A(); # Also allowed var_dump($b); $b->instOfSelf = new B(); # Allowed var_dump($b); $b->instOfSelf = new A(); # ERROR var_dump($b);
Output for git.master, git.master_jit, rfc.property-hooks
object(B)#1 (1) { ["instOfSelf"]=> uninitialized(self) ["instOfParent"]=> object(B)#2 (0) { ["instOfSelf"]=> uninitialized(self) ["instOfParent"]=> uninitialized(parent) } } object(B)#1 (1) { ["instOfSelf"]=> uninitialized(self) ["instOfParent"]=> object(A)#3 (0) { } } object(B)#1 (2) { ["instOfSelf"]=> object(B)#2 (0) { ["instOfSelf"]=> uninitialized(self) ["instOfParent"]=> uninitialized(parent) } ["instOfParent"]=> object(A)#3 (0) { } } Fatal error: Uncaught TypeError: Cannot assign A to property B::$instOfSelf of type self in /in/n820F:21 Stack trace: #0 {main} thrown in /in/n820F on line 21
Process exited with code 255.

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