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=================================
MongoDB\\Client::selectDatabase()
=================================
.. default-domain:: mongodb
.. contents:: On this page
:local:
:backlinks: none
:depth: 1
:class: singlecol
Definition
----------
.. phpmethod:: MongoDB\\Client::selectDatabase()
Selects a database on the server.
.. code-block:: php
function selectDatabase($databaseName, array $options = []): MongoDB\Database
This method has the following parameters:
.. include:: /includes/apiargs/MongoDBClient-method-selectDatabase-param.rst
The ``$options`` parameter supports the following options:
.. include:: /includes/apiargs/MongoDBClient-method-selectDatabase-option.rst
Return Values
-------------
A :phpclass:`MongoDB\\Database` object.
Errors/Exceptions
-----------------
.. include:: /includes/extracts/error-invalidargumentexception.rst
Behavior
--------
The selected database inherits options such as read preference and type mapping
from the :phpclass:`Client <MongoDB\\Client>` object. Options may be overridden
via the ``$options`` parameter.
Example
-------
The following example selects the ``test`` database:
.. code-block:: php
<?php
$client = new MongoDB\Client;
$db = $client->selectDatabase('test');
The following examples selects the ``test`` database with a custom read
preference:
.. code-block:: php
<?php
$client = new MongoDB\Client;
$db = $client->selectDatabase(
'test',
[
'readPreference' => new MongoDB\Driver\ReadPreference(MongoDB\Driver\ReadPreference::RP_SECONDARY),
]
);
See Also
--------
- :phpmethod:`MongoDB\\Client::__get()`
- :phpmethod:`MongoDB\\Database::__construct()`