Install MongoDB

1. Import the public key used by the package management system.

sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv EA312927

2. Create a list file for MongoDB.

echo "deb http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.2 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.2.list

3. Reload local package database.

sudo apt-get update

4. Install the MongoDB packages.

sudo apt-get install -y mongodb-org

Install PHP Driver

1. Install PHP pear

sudo apt-get install php-pear

2. Install MondoDB Driver

sudo pecl install mongodb

Configure PHP

1. Create mongo.ini file in /etc/php/7.0/mods-available with the following content:

; configuration for php mongodb module
; priority=20
extension=mongodb.so

2. Create symlinks

sudo ln -s /etc/php/7.0/mods-available/mongo.ini /etc/php/7.0/cli/conf.d/20-mongo.ini
sudo ln -s /etc/php/7.0/mods-available/mongo.ini /etc/php/7.0/fpm/conf.d/20-mongo.ini

3. Restart Nginx and PHP

sudo service php7.0-fpm restart && sudo service nginx restart

4. test

php -i | grep 'Mongo'

<?php
// http://php.net/manual/en/class.mongodb-driver-manager.php
$manager = new MongoDB\Driver\Manager();
echo '<pre>';
var_dump($manager);
echo '</pre>';
exit;