# The MongoDB\BSON\ObjectIdInterface interface

(mongodb >=1.3.0)

## Introduction

This interface is implemented by MongoDB\BSON\ObjectId to be used as a parameter, return, or property type in userland classes.

## Class synopsis

class MongoDB\BSON\ObjectIdInterface {
/* Methods */
abstract public getTimestamp(): int
abstract public __toString(): string
}

## Changelog

Version | Description
--- | ---
PECL mongodb 2.0.0 | Return types previously declared as tentative are now enforced.
PECL mongodb 1.15.0 | Return types for methods are declared as tentative on PHP 8.0 and newer, triggering deprecation notices in code that implements this interface without declaring the appropriate return types. The `#[ReturnTypeWillChange]` attribute can be added to silence the deprecation notice.

## Table of Contents

- MongoDB\BSON\ObjectIdInterface::getTimestamp — Returns the timestamp component of this ObjectIdInterface
- MongoDB\BSON\ObjectIdInterface::__toString — Returns the hexidecimal representation of this ObjectIdInterface

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