Solving the issue of browser not opening php file (Ubuntu)

Just try the following.....

sudo /etc/init.d/apache2 stop
sudo apt-get remove --purge apache2 php5
sudo apt-get remove --purge libapache2-mod-php5
sudo apt-get install php5 apache2 libapache2-mod-php5
sudo /etc/init.d/apache2 start