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<?php class Foo { protected $bar; public function __construct($bar = null) { $this->bar = $bar; } } $a = new Foo('baz'); $b = new $a; var_dump($a, $b);
Output for git.master, git.master_jit, rfc.property-hooks
object(Foo)#1 (1) { ["bar":protected]=> string(3) "baz" } object(Foo)#2 (1) { ["bar":protected]=> NULL }

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