PHP
Scripting language created in 1994 / From Wikipedia, the free encyclopedia
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PHP is a general-purpose scripting language geared towards web development.[8] It was originally created by Danish-Canadian programmer Rasmus Lerdorf in 1993 and released in 1995.[9][10] The PHP reference implementation is now produced by the PHP Group.[11] PHP was originally an abbreviation of Personal Home Page,[12][13] but it now stands for the recursive initialism PHP: Hypertext Preprocessor.[14]
Paradigm | Multi-paradigm: imperative, functional, object-oriented, procedural, reflective |
---|---|
Designed by | Rasmus Lerdorf |
Developer | The PHP Development Team, Zend Technologies, PHP Foundation |
First appeared | 8 June 1995; 28 years ago (1995-06-08)[1][2] |
Stable release | |
Typing discipline | Dynamic, weak, gradual[4] |
Implementation language | C (primarily; some components C++) |
OS | Unix-like, Windows, macOS, IBM i, OpenVMS, IBM Z |
License | dual licensed GNU General Public License version 2 or any later version and PHP License for PHP versions 3.0 or earlier.[5] Only PHP License (most of Zend engine under Zend Engine License) for 3.01x and later versions. |
Filename extensions | .php ,.phar ,.phtml ,.pht ,.phps |
Website | www |
Major implementations | |
Zend Engine, HHVM, PeachPie, Quercus, Parrot | |
Influenced by | |
Perl, C, C++, Java,[6] Tcl,[2] JavaScript[7] | |
Influenced | |
Hack, JSP, ASP, React JS | |
|
PHP code is usually processed on a web server by a PHP interpreter implemented as a module, a daemon or 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 that 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[15] and drone control.[16] 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.[17]
The PHP language has evolved without a written formal specification or standard, with the original implementation acting as the de facto standard that other implementations aimed to follow.
W3Techs reports that as of 23 March 2024[update] (the four months after the PHP 8.3 release), PHP is used by 76.4% of all websites whose programming language could be determined, and 57.2% thereof use PHP 7 which is outdated and known to be insecure.[18] Additionally, PHP 8.0 is no longer supported, meaning the vast majority of PHP users utilize outdated versions, and well over half of all websites, PHP-using or not (whose programming language could be determined) are insecure.