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Stable API

On this page

  • Declaring an API Version
  • Strict API
  • Fail on Deprecated Commands
  • Usage with the Command Helper

Declaring an API Version

To declare an API version, pass a serverApi driver option when creating your client. The value is a MongoDB\Driver\ServerApi instance that contains API version information. This feature is introduced in MongoDB 5.0, which will initially support only API version "1". Additional versions may be introduced in future versions of the server.

<?php
use MongoDB\Client;
use MongoDB\Driver\ServerApi;
$serverApi = new ServerApi(ServerApi::V1);
$client = new Client('mongodb://127.0.0.1', [], ['serverApi' => $serverApi]);
// Command includes the declared API version
$client->database->collection->find([]);

Note

Only declare an API version when connecting to a deployment that has no pre-5.0 members. Older servers will error when encountering commands with a declared API version.

Strict API

By default, declaring an API version guarantees behavior for commands that are part of the stable API, but does not forbid using commands that are not part of the API version. To only allow commands and options that are part of the stable API, specify the strict option when creating the MongoDB\Driver\ServerApi instance:

<?php
use MongoDB\Client;
use MongoDB\Driver\ServerApi;
$serverApi = new ServerApi(ServerApi::V1, true);
$client = new Client('mongodb://127.0.0.1', [], ['serverApi' => $serverApi]);
// Will fail as the tailable option is not supported in versioned API
$client->database->collection->find([], ['tailable' => true]);

Fail on Deprecated Commands

The optional deprecationErrors option causes MongoDB to fail all commands or behaviors that have been deprecated in the API version. This can be used in testing to ensure a smooth transition to a future API version.

<?php
use MongoDB\Client;
use MongoDB\Driver\ServerApi;
$serverApi = new ServerApi(ServerApi::V1, null, true);
$client = new Client('mongodb://127.0.0.1', [], ['serverApi' => $serverApi]);

Note

At the time of this writing, no part of API version "1" has been deprecated.

Usage with the Command Helper

When using the MongoDB\Database::command() method to run arbitrary commands, the API version declared to the client is automatically appended to the command document. Setting any of the apiVersion, apiStrict, or apiDeprecationErrors command options in the command document and calling MongoDB\Database::command() from a client with a declared API version is not supported and will lead to undefined behavior.

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