What (who) is PHP - definition
![A "Hello World" application in PHP 7.4 running on its built-in development server](https://commons.wikimedia.org/wiki/Special:FilePath/"Hello World" Application in PHP.png?width=200 "A \"Hello World\" application in PHP 7.4 running on its built-in development server")
![This is an example of PHP code for the [[WordPress]] [[content management system]].](https://commons.wikimedia.org/wiki/Special:FilePath/Custom-software-developement-php-net.JPG?width=200 "This is an example of PHP code for the [[WordPress]] [[content management system]].")
![Squid]]](https://commons.wikimedia.org/wiki/Special:FilePath/LAMP software bundle.svg?width=200 "Squid]]")
 Screen.png?width=200 "Example output of the phpinfo() function in PHP 7.1")
![Dynamic web page: example of [[server-side scripting]] (PHP and MySQL)](https://commons.wikimedia.org/wiki/Special:FilePath/Scheme dynamic page en.svg?width=200 "Dynamic web page: example of [[server-side scripting]] (PHP and MySQL)")
 Philippines Back.png?width=200 "100px")
 Philippines Font.png?width=200 "100px")
![United States Administration 50 centavos silver coin minted in [[San Francisco]] in 1918.](https://commons.wikimedia.org/wiki/Special:FilePath/Filipinas (PI) 50 Centavos Silver Coin 1918 (s).jpg?width=200 "United States Administration 50 centavos silver coin minted in [[San Francisco]] in 1918.")
![[[Piloncitos]], a type of coin used by the pre-colonial peoples of the archipelago](https://commons.wikimedia.org/wiki/Special:FilePath/Manila Mint Museum, PI Piloncitos.jpg?width=200 "[[Piloncitos]], a type of coin used by the pre-colonial peoples of the archipelago")
.jpg?width=200 "50-centavo coin, ''English series'' (1964)")
![1-piso]] coin, ''Pilipino series'', 1972–74](https://commons.wikimedia.org/wiki/Special:FilePath/1974phil1pisoobv.jpg?width=200 "1-piso]] coin, ''Pilipino series'', 1972–74")
![One-peso]] Treasury Certificate, 1924](https://commons.wikimedia.org/wiki/Special:FilePath/PHI-68c-Philippine Islands-Treasury Certificate-1 Peso (1924).jpg?width=200 "One-peso]] Treasury Certificate, 1924")
![Two-peso note]], Ang Bagong Lipunan series](https://commons.wikimedia.org/wiki/Special:FilePath/P2 Ang Bagong Lipunan series (Obverse).jpg?width=200 "Two-peso note]], Ang Bagong Lipunan series")
![Five-peso note]], New Design Series](https://commons.wikimedia.org/wiki/Special:FilePath/NDS obverse 5 Philippine peso bill.jpg?width=200 "Five-peso note]], New Design Series")
Wikipedia
PHP is a general-purpose scripting language geared toward web development. It was originally created by Danish-Canadian programmer Rasmus Lerdorf in 1993 and released in 1995. The PHP reference implementation is now produced by The PHP Group. PHP was originally an abbreviation of Personal Home Page, but it now stands for the recursive initialism PHP: Hypertext Preprocessor.
PHP code is usually processed on a web server by a PHP interpreter implemented as a module, a daemon or as a Common Gateway Interface (CGI) executable. On a web server, the result of the interpreted and executed PHP code – which may be any type of data, such as generated HTML or binary image data – would form the whole or part of an HTTP response. Various web template systems, web content management systems, and web frameworks exist which can be employed to orchestrate or facilitate the generation of that response. Additionally, PHP can be used for many programming tasks outside the web context, such as standalone graphical applications and robotic drone control. PHP code can also be directly executed from the command line.
The standard PHP interpreter, powered by the Zend Engine, is free software released under the PHP License. PHP has been widely ported and can be deployed on most web servers on a variety of operating systems and platforms.
The PHP language evolved without a written formal specification or standard until 2014, with the original implementation acting as the de facto standard which other implementations aimed to follow. Since 2014, work has gone on to create a formal PHP specification.
W3Techs reports that as of January 2023, "PHP is used by 77.8% of all the websites whose server-side programming language we know." It also reports that only 8% of PHP users use the currently supported 8.x versions. Most use unsupported PHP 7, more specifically 7.4, and even PHP 5 has 23% of the use, also not supported with security updates, and known to have serious security vulnerabilities.
