Is Apache downloading PHP files?

Apache is downloading php files instead of displaying them. OS and server information: I previously had php 5.3.x installed but decided to upgrade. I first uninstalled the php 5.3.x and then installed php 5.5.1 but after the installation completed apache did not parse the php files it just downloaded them.
For More Information Please Refer:
https://stackoverflow.com/questions/18422140/apache-is-downloading-php-files-instead-of-displaying-them
You May Also Like to Read: