What is PHP?

From any information from official site of PHP, PHP is Hypertext Prepocessor. PHP is language of programming that can be inserted into HTML script. Many of the syntax is like C language, Java, and Perl. The purpose of PHP is help the developer to build a dynamic web.
PHP usually used to make a dynamic web with dynamic input. The variety of input make the view of the site is depend on the user. PHP can reduce the time to make the huge web. PHP make the web more interactive, also, PHP can use the variety of tools.
Before you working with PHP, firstly you must know about the base of HTML.
The Application that you want to start build PHP web
1. Web Server that support PHP (I always use Apache).
2. Database Server (Usually MySql, Oracle, or maybe MS Access)