Install MongoDB driver for PHP on Ubuntu

Type following line in command line:

sudo pecl install mongo

If Pecl throws this error: configure: error: sasl.h not found! add following command and retry installing mongodb

sudo apt-get install libsasl2-dev

After installing, add the mongo extension to php.ini

Restart apache:

sudo service apache2 restart

See if driver is installed by calling the phpinfo() function.