PHP is a server-side scripting language created for web development but additionally used as a general-purpose programming terminology. As of Jan 2013, PHP was installed on more than 240 million web sites (39% of those sampled) and 2.1 million web servers. Originally developed by Rasmus Lerdorf in early 90’s, the reference implementation of PHP (the actual Zend Engine) is currently produced by the particular PHP Group. While PHP originally represented Personal Home Web page, it now means PHP: Hypertext Preprocessor.
PHP program code can be simply mixed with HTML code, or it may be used in combination with various templating engines and web frameworks. PHP code is usually processed by any PHP interpreter, which can be usually implemented being a web server’s native module or a typical Gateway Interface (Special) executable. After the particular PHP code is interpreted and performed, the web server sends resulting end result to its consumer, usually in type of a part with the generated web site – for example, PHP code can generate a net page’s HTML code, an image, or even some other data. PHP has furthermore evolved to add a command-line user interface (CLI) capability and could be used inside standalone graphical programs.