The toPHP() methods in MongoDB\BSON\Document and MongoDB\BSON\PackedArray both enable int64_as_object: true in the type map; however, the option is not enabled for debug output. This results in Int64 values being presented as basic integer types when dumping the object with var_dump(), which might mislead users.

I'm not sure if this was an oversight (and thus a possible bug), or intentional. If intentional, there may not be a good place to document this subtle behavioral difference since we don't maintain API docs for debug handlers (there technically isn't a __debugInfo() method).

I encountered this while writing documentation examples for the BulkWriteCommandResult methods that return verbose results as Document instances (the server reports counts as Int64 types).