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<?php class Foo {} class Bar {} function alice(Foo $obj) { $obj = new Bar(); } function bob(Foo &$obj) { $obj = new Bar(); } $obj_a = new Foo(); alice($obj_a); var_dump($obj_a); $obj_b = new Foo(); bob($obj_b); var_dump($obj_b);
Output for git.master, git.master_jit, rfc.property-hooks
object(Foo)#1 (0) { } object(Bar)#3 (0) { }

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