--TEST-- MongoDB\BSON\Undefined can be cloned --FILE-- <?php require_once __DIR__ . '/../utils/tools.php'; $test = MongoDB\BSON\toPHP(MongoDB\BSON\fromJSON('{ "undefined": {"$undefined": true} }')); $undefined = $test->undefined; $undefined->foo = 'bar'; $clone = clone $undefined; var_dump($clone == $undefined); var_dump($clone === $undefined); var_dump($clone->foo); ?> ===DONE=== <?php exit(0); ?> --EXPECT-- bool(true) bool(false) string(3) "bar" ===DONE===