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<?php class Foo { public function __construct(private Bar $bar, private string $_value = 'foo') {} public string $value { get => $this->_value; set { $this->bar->doSomething($this); $this->_value = $value; } } } class Bar { public function doSomething(Foo $foo): void { $oldValue = $foo->value; } } $foo = new Foo(new Bar()); $foo->value = 'bar';
Output for rfc.property-hooks
Fatal error: Uncaught Error: Must not read from virtual property Foo::$value in /in/6W26c:17 Stack trace: #0 /in/6W26c(9): Bar->doSomething(Object(Foo)) #1 /in/6W26c(22): Foo->$value::set('bar') #2 {main} thrown in /in/6W26c on line 17
Process exited with code 255.

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