Hypertext Pre-Processor or PHP is a programming language using which developers are building various application software to use on various devices. PHP is more popular for web solutions and backend solutions. Software developers build various desktop-based stand-alone solutions using PHP programming. Usually, PHP is used together with MySQL database and Apache web server on Linux OS. This combination of technologies is popularly known as LAMP. It is free to use and most have default installation on Linux servers. PHP has evolved with contributions from the huge community present worldwide. PHP is regarded as the most popular server-side scripting language in the world.