What is CMS

A CMS (Content Management system) is a Web Application which manages your application in very effective and efficient manner by using the core concept of the Languages. By the using CMS, websites and some small web application deploy with in hours. It is very helpful and easy to manage the content dynamically without any technical training.
By the using of such type of Elementary system you can easily add number of Pages, Posts, stories in your websites without any need of HTML and some programming language. Adding the attachment, images, banner on your web on the fly.
It is also very helpful for SEO (Search Engine optimization) point of view because it provides number of SEO related information like permalink customization, URL rewriting concepts etc.
Wordpress, Drupal, Joomla are very good CMS of PHP.