# The MongoDB\Driver\Monitoring\Subscriber interface

(mongodb >=1.3.0)

## Introduction

Base interface for event subscribers. This is used for type-hinting MongoDB\Driver\Monitoring\addSubscriber() and MongoDB\Driver\Monitoring\removeSubscriber() and should not be implemented directly.

## Interface synopsis

MongoDB\Driver\Monitoring\Subscriber {
}

This interface has no methods. Its only purpose is to be the base interface for all event subscribers.