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<?php class C { private $name; public function __construct(string $name) { $this->name = $name; } public function __toString() { return $this->name; } } function f(string $a, C $b) : void { var_dump($a, $b); } $a = new C('a'); $b = new C('b'); f($a, $b);
Output for git.master, git.master_jit, rfc.property-hooks
string(1) "a" object(C)#2 (1) { ["name":"C":private]=> string(1) "b" }

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