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==============================
MongoDB\\Client::__construct()
==============================
.. default-domain:: mongodb
.. contents:: On this page
:local:
:backlinks: none
:depth: 1
:class: singlecol
Definition
----------
.. phpmethod:: MongoDB\\Client::__construct()
Constructs a new :phpclass:`Client <MongoDB\\Client>` instance.
.. code-block:: php
function __construct($uri = 'mongodb://127.0.0.1/', array $uriOptions = [], array $driverOptions = [])
:phpmethod:`MongoDB\\Client::__construct()` has the following parameters:
.. include:: /includes/apiargs/MongoDBClient-method-construct-param.rst
The ``$driverOptions`` parameter supports the following options:
.. include:: /includes/apiargs/MongoDBClient-method-construct-driverOptions.rst
Examples
--------
If you do not specify a ``$uri`` value, the driver connects to a standalone
:program:`mongod` on ``127.0.0.1`` via port ``27017``. The following example
demonstrates how to connect to a replica set with a custom read preference:
.. code-block:: php
<?php
$client = new MongoDB\Client(
'mongodb://rs1.example.com,rs2.example.com/?replicaSet=myReplicaSet',
[
'readPreference' => 'secondaryPreferred',
]
);
By default, the |php-library| deserializes BSON documents and arrays
as :phpclass:`MongoDB\\Model\\BSONDocument` and
:phpclass:`MongoDB\\Model\\BSONArray` objects, respectively. The following
example demonstrates how to have the library unserialize everything as a PHP
array, as was done in the legacy :php:`mongo extension <mongo>`.
.. code-block:: php
<?php
$client = new MongoDB\Client(
null,
[],
[
'typeMap' => [
'root' => 'array',
'document' => 'array',
'array' => 'array',
],
]
);
.. seealso::
- :php:`MongoDB\\Driver\\Manager::__construct()
<mongodb-driver-manager.construct>`