--TEST-- MongoDB\BSON\ObjectId #002 generates ObjectId for null or missing constructor argument --FILE-- <?php var_dump(new MongoDB\BSON\ObjectId); var_dump(new MongoDB\BSON\ObjectId(null)); ?> ===DONE=== <?php exit(0); ?> --EXPECTF-- object(MongoDB\BSON\ObjectId)#%d (%d) { ["oid"]=> string(24) "%x" } object(MongoDB\BSON\ObjectId)#%d (%d) { ["oid"]=> string(24) "%x" } ===DONE===