Find a document with ObjectID in mongoDB

Question

When I inserted some documents into a collection (without an ObjectID) mongoDB adds its own ObjectIDs.

I want to query a document by its unique ObjectID.

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Answer 1

With alcaeus/mongo-php-adapter (under php 7), needed to convert \MongoId to BSON type:

$filter = [];
$filter['_id'] = (new \MongoId('4e49fd8269fd873c0a000000'))->toBSONType();
$cursor = $collection->find($filter);