It uses server-side scripting whereby a script is installed on a server so that server can deliver results dependent on the input of the end user.
It is particularly popular for web development since it can easily be embedded into HTML pages.
PHP Code itself uses start and end codes so that it is easy for a Web Developer to switch into and out of PHP.
One of the main advantages of PHP is that it has a gentle learning curve so that newcomers can quickly get to grips with the basics. But PHP is also extremely powerful.
As well as performing simple tasks such as collecting user data entered via an online form and creating dynamic pages, PHP has more advanced features too.
Typically PHP is used for Server Side Scripting, Command Line Scripting and even for creating desktop applications.
PHP is compatible with all major Operating Systems including Linux, Windows and MAC OS. It is also compatible with most popular Web Servers such as Apache and LiteSpeed.
PHP can be used to create dynamic content such as PDFs, images and video and is compatible with the most popular types of database tools such as MySQL.
PHP is used to power some of the most popular software such as blogging tools like WordPress and Joomla as well as Ecommerce Shopping carts like OpenCart and Prestashop and Bulletin Board tools like PHPBB and vBulletin.
PHP can also be used to add extra functionality to your website by integrating applications built for 3rd party websites such as Facebook or by creating PHP based mailing lists or you can even create WordPress Plugins for commercial use.
As PHP is OpenSource it is updated frequently and you can find the most recent versions on the PHP Downloads page.