=========================
Install the |php-library|
=========================

.. default-domain:: mongodb

.. contents:: On this page
   :local:
   :backlinks: none
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   :class: singlecol

The |php-library| is a high-level abstraction for the
`PHP driver <https://php.net/mongodb>`_ (i.e. ``mongodb`` extension). This page
will briefly explain how to install both the ``mongodb`` extension and the
|php-library|.

Installing the Extension
------------------------

Linux, Unix, and macOS users can either
:php:`install the extension with PECL <manual/en/mongodb.installation.pecl.php>`
(recommended) or
:php:`manually compile from source <manual/en/mongodb.installation.manual.php>`.
The following command may be used to install the extension with PECL:

.. code-block:: sh

   sudo pecl install mongodb

.. note::

   If the build process for either installation method fails to find a TLS
   library, check that the development packages (e.g. ``libssl-dev``) and
   `pkg-config <https://en.wikipedia.org/wiki/Pkg-config>`_ are both installed.

Once the extension is installed, add the following line to your ``php.ini``
file:

.. code-block:: ini

   extension=mongodb.so

Windows users can download precompiled binaries of the extension from
`PECL <https://pecl.php.net/package/mongodb>`_. After extracting the
``php_mongodb.dll`` file to PHP's extension directory, add the following line to
your ``php.ini`` file:

.. code-block:: ini

   extension=php_mongodb.dll

Windows binaries are available for various combinations of PHP version,
thread-safety, and architecture. Failure to select the correct binary will
result in an error attempting to load the extension DLL at runtime. Additional
considerations for Windows are discussed in the
:php:`Windows installation documentation <manual/en/mongodb.installation.windows.php>`.

.. note::

   If your system has multiple versions of PHP installed, each version will have
   its own ``pecl`` command and ``php.ini`` file. Additionally, PHP may also use
   separate ``php.ini`` files for its web and CLI environments. If the extension
   has been installed but is not available at runtime, double-check that you
   have used the correct ``pecl`` command (or binary in the case of Windows) and
   have modified the appropriate ``php.ini`` file(s).

Installing the Library
----------------------

The preferred method of installing the |php-library| is with
`Composer <https://getcomposer.org/>`_ by running the following command from
your project root:

.. code-block:: sh

   composer require mongodb/mongodb

While not recommended, you may also manually install the library using a source
archive attached to the
`GitHub releases <https://github.com/mongodb/mongo-php-library/releases>`_.

Configure Autoloading
~~~~~~~~~~~~~~~~~~~~~

Once you have installed the library, ensure that your application includes
Composer's autoloader as in the following example:

.. code-block:: php

   <?php

   require_once __DIR__ . '/vendor/autoload.php';

Refer to Composer's `autoloading documentation
<https://getcomposer.org/doc/01-basic-usage.md#autoloading>`_ for more
information about setting up autoloading.

If you installed the library manually from a source archive, you will need to
manually configure autoloading:

#. Map the top-level ``MongoDB\`` namespace to the ``src/`` directory
   using your preferred autoloader implementation.

#. Manually require the ``src/functions.php`` file. This is necessary because
   PHP does not support autoloading for functions.