I can give you my build recipe from a fresh 12.04 installation. Fresh being simply running through the configuration and only selecting the "SSH server" option at the end for convenience.
MongoDB installation is optional, so if you want this on a different server then skip. But the general instructions come from:
http://docs.mongodb.org/manual/tutorial/install-mongodb-on-ubuntu/
All commands split up and not automated so you can see the steps:
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10
echo 'deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen' | sudo tee /etc/apt/sources.list.d/mongodb.list
sudo apt-get install software-properties-common
sudo apt-get install python-software-properties
sudo add-apt-repository ppa:ondrej/php5
sudo apt-get update
sudo apt-get install mongodb-10gen
sudo apt-get install build-essential
sudo apt-get install php5-dev
sudo apt-get install libcurl4-openssl-dev
sudo pecl install mongo
Lots of compiler output. Ending with success and asking to mofidy php.ini
Edit the CLI settings. And do the same for the apache config as well
sudo vi /etc/php5/cli/php.ini
sudo vi /etc/php5/apache2/php.ini
Personal preference, after the comments on 'Dynamic Extensions'
extension=mongo.so
Test that usage and connection does not throw an error. Create test.php:
<?php
$m = new MongoClient('mongodb://localhost/',
array('connectTimeoutMS'=> 500, 'socketTimeoutMS' => 500 ));
?>
And run from command line:
php test.php
No errors. Then you are all set up.
$ php -v
PHP 5.5.3-1ubuntu2.1 (cli) (built: Dec 12 2013 04:24:35)
Copyright (c) 1997-2013 The PHP Group
Zend Engine v2.5.0, Copyright (c) 1998-2013 Zend Technologies
with Zend OPcache v7.0.3-dev, Copyright (c) 1999-2013, by Zend Technologies