What is PHP?
PHP is an open source programming language which is widely used throughout the internet for creating dynamic websites. The full form of PHP is Hypertext Processor. One of the advantages of PHP is that it is easy to learn and has a lot of support online as well as offline. Also most web hosting companies support PHP.
PHP and MYSQL based databases can coexist and easily communicate with built in functions and classes with the language itself. This makes building a dynamic data base driven website easy to build.
PHP is a server side scripting language. What this means is that the server has to compute the arguments given to it before they are delivered to the users browser. This makes it different from Javascript that can compute the code in real time within the browser itself.
Both the methods have their pros and cons but the advantage to using PHP is that even if it is server side it can easily communicate with Javascript to create a server-client side environment. This will help to make your user's experience at your site, one of the best on the internet.