There is no shortage of websites that use the PHP programming language in some or other capacity. PHP (Hypertext Preprocessor) is a server-side scripting language that allows you to create dynamically-generated web pages. Rasmus Lerdorf created PHP in 1994. PHP works in the backend of a website because it is a server-side technology. This is the part of a website that no one sees. This means that PHP is frequently used to run server-side...