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