MongoDB\BSON\ObjectIdInterface::__toString Returns the hexidecimal representation of this ObjectIdInterface &reftitle.description; abstract public stringMongoDB\BSON\ObjectIdInterface::__toString &reftitle.parameters; &no.function.parameters; &reftitle.returnvalues; Returns the hexidecimal representation of this ObjectIdInterface. &reftitle.seealso; MongoDB\BSON\ObjectId::__toString