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<?php class Foo { public $a = 1; public $b = 2; } class Bar { public $ref; } $foo = new Foo(); $bar = new Bar(); $bar->ref =& $foo->a; $bar->ref = '123'; var_dump($foo);
Output for git.master, git.master_jit, rfc.property-hooks
object(Foo)#1 (2) { ["a"]=> &string(3) "123" ["b"]=> int(2) }

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