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<?php class HasProp { public int $x; public function __sleep() { return ['x']; } } $x = new HasProp(); // string(28) "O:7:"HasProp":1:{s:1:"x";N;}" var_dump($s = serialize($x)); // Fatal error: Uncaught TypeError: Typed property HasProp::$x must be int, null used in ... unserialize($s);
Output for git.master, git.master_jit, rfc.property-hooks
string(18) "O:7:"HasProp":0:{}"

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