PHP(Hyper text pre-processor) is open source scripting language and its widely used for web development such as Asp. PHP is very easy to understand by developers and more comfortable used with HTML & MySQL.
If you want develop a website with no setup cost and no other paid resource you can use and develop website in less time and easily. Use of PHP you can create more and more secure websites this time with latest PHP version.
If you want learn more please read my next article.