These days, it is now a common practice to serve a website either with or without the www prefix. In fact, most companies prefer it without the www because it’s easier to type and remember. Not to mention, the letter “w” has the longest syllable in the alphabet. Try to say that three times before the domain name. And don’t give me that “dubdubdub” stuff

So, if you’re hosting your own server and/or have access to the Apache configuration file (it’s usually httpd.conf or apache2.conf) and running multiple sites, you can copy the following lines in your conf file (replace example.com with your domain name):

<VirtualHost *>
    DocumentRoot /var/www/web
    ServerName www.example.com
    ServerAlias example.com
</VirtualHost>

In addition, make sure that the A Record in your DNS setting had the example.com and www.example.com pointing to the same IP address.

sudo apt-get install apache2
sudo apt-get install php5
sudo apt-get install libapache2-mod-php5
sudo /etc/init.d/apache2 restart

And that’s it. Your web server with PHP is ready to go. The default location of the Doument Root can be found in /var/www

If you need a CLI (command-line-interface) for PHP you can run the following command:

sudo apt-get install php5-cli