DOCSP-41955: Connect to MongoDB (#100)

* DOCSP-41955: Connect to MongoDB

* edits

* edit

* RR feedback

* typo

* code edit

Author: norareidy

source/get-started.txt

@@ -23,6 +23,7 @@ Get Started with the PHP Library
    /get-started/download-and-install/
    /get-started/create-a-deployment/
    /get-started/create-a-connection-string/
+   /get-started/connect-to-mongodb/
    /get-started/next-steps/
 
 Overview

source/get-started/connect-to-mongodb.txt

@@ -0,0 +1,69 @@
+.. _php-connect-to-mongodb:
+
+==================
+Connect to MongoDB
+==================
+
+.. facet::
+   :name: genre
+   :values: tutorial
+
+.. meta::
+   :keywords: test connection, runnable, code example
+
+After retrieving the connection string for your MongoDB Atlas deployment,
+you can connect to the deployment from your PHP application and query
+the Atlas sample datasets.
+
+.. procedure::
+   :style: connected
+
+   .. step:: Edit your PHP application file
+
+      Copy and paste the following code into the ``quickstart.php`` file, which queries
+      the ``movies`` collection in the ``sample_mflix`` database:
+
+      .. literalinclude:: /includes/get-started/quickstart.php
+         :language: php
+         :dedent:
+
+   .. step:: Assign the connection string
+
+      Replace the ``<connection string>`` placeholder with the 
+      connection string that you copied from the :ref:`php-connection-string`
+      step of this guide.
+
+   .. step:: Run your PHP application
+
+      In your project directory, run the following shell command to start the application:
+      
+      .. code-block:: bash
+
+         php quickstart.php
+
+      The command line output contains details about the retrieved movie
+      document:
+
+      .. code-block:: none
+         :copyable: false
+
+         {
+             "_id": {
+                 "$oid": "..."
+             },
+             ...
+            "rated": "R",
+            "metacritic": 80,
+            "title": "The Shawshank Redemption",
+            ...
+         }
+
+      If you encounter an error or see no output, ensure that you specified the
+      proper connection string in the ``quickstart.php`` file and that you loaded the
+      sample data.
+
+After you complete these steps, you have a PHP application that
+connects to your MongoDB deployment, runs a query on the sample
+data, and returns a matching document.
+
+.. include:: /includes/get-started/troubleshoot.rst

source/includes/get-started/quickstart.php

@@ -0,0 +1,17 @@
+<?php
+
+require __DIR__ . '/../vendor/autoload.php';
+
+use MongoDB\Client;
+
+$client = new Client('<connection string>');
+$collection = $client->sample_mflix->movies;
+
+$filter = ['title' => 'The Shawshank Redemption'];
+$result = $collection->findOne($filter);
+
+if ($result) {
+    echo json_encode($result, JSON_PRETTY_PRINT);
+} else {
+    echo "Document not found";
+}