How to configure your Ubuntu localhost for PHP MVC URL routing

Step 1. Open a terminal and type
sudo gedit /etc/apache2/sites-available/default
or whatever text editor you like using to open up your apache configuration file for editing.
Step 2. Under the sections headed  <Directory /> and <Directory /var/www/>:
Change the line 'AllowOverride none' to 'AllowOverride All'.

Step 3.  Open up a terminal and type
hostname
This will display your hostname.

Step 4. Open up a terminal and type
sudo gedit /etc/hosts
or whatever text editor you like using to open up your hosts file for editing.
Step 5. Modify the first line so it reads
127.0.0.1    localhost localhost.localdomain yourhostname
Step 6. Open up a terminal and type
sudo a2enmod rewrite

Restart your computer.
It will now work.