PHP is a server scripting language, and a powerful tool for making dynamic and interactive Web pages. PHP stands for Hypertext Preprocessor. It is a very popular and widely-used open source server-side scripting language to write dynamically generated web pages. PHP scripts are executed on the server and the result is sent to the web browser as plain HTML. PHP 7 is the latest stable release.
PHP has several advantages over other server side scripting languages.
Easy to learn
For beginner web programmers, PHP is often considered as the easier and preferable language to learn.
PHP is an open-source project which is developed and maintained by a worldwide community of developers who make its source code freely available to download and use.
PHP runs on various platforms such as Linux, Microsoft Windows, Mac OS etc. and it is compatible with almost all servers used today such Apache, IIS.
PHP scripts usually execute faster than those written in other scripting languages like ASP, Ruby, Python, Java, etc.
Since PHP is supported by the worldwide community, it is extremely easy to find help or documentation.