Please note that as of October 24, 2014, the Nokia Developer Wiki will no longer be accepting user contributions, including new entries, edits and comments, as we begin transitioning to our new home, in the Windows Phone Development Wiki. We plan to move over the majority of the existing entries. Thanks for all your past and future contributions.
PHP stands for Hypertext Preprocessor. It is server side scripting language which are used for Web development and can be embedded into HTML. PHP can be used to create dynamic and interactive web pages. PHP is widely used, because it's powerfull and also free.
PHP works almost every operating system, Linux, Unix, Windows, etc and can be used with different servers. Because PHP is free, so one of the most used servers with PHP are Apache, which are also free to download.