ref: note-bson-comparison content: | When evaluating query criteria, MongoDB compares types and values according to its own :manual:`comparison rules for BSON types </reference/bson-type-comparison-order>`, which differs from PHP's :php:`comparison <manual/en/types.comparisons.php>` and :php:`type juggling <manual/en/language.types.type-juggling.php>` rules. When matching a special BSON type the query criteria should use the respective :php:`BSON class <manual/en/book.bson.php>` in the driver (e.g. use :php:`MongoDB\\BSON\\ObjectId <class.mongodb-bson-objectid>` to match an :manual:`ObjectId </reference/object-id/>`). ...