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<?php class Foo { public readonly int $bar; public function set(int $i) { $this->bar = &$i; } } $i = 1; $foo = new Foo(); $foo->set($i); $i = 20; var_dump($foo->bar);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Cannot indirectly modify readonly property Foo::$bar in /in/NMDAp:10 Stack trace: #0 /in/NMDAp(17): Foo->set(1) #1 {main} thrown in /in/NMDAp on line 10
Process exited with code 255.

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