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Paradigm(s) imperative, object-oriented, Procedural, reflective
Appeared in 1995; 20 years ago (1995)[1]
Designed by Rasmus Lerdorf
Developer The PHP Group
Stable release 5.6.10 / June 11, 2015; 54 days ago (2015-06-11)[2]
Typing discipline Dynamic, weak
Major implementations Zend Engine, Phalanger, Quercus, Project Zero, HHVM
Influenced by C, C++, Java, Perl, Tcl[1]
Influenced Hack
Implementation language C
OS Cross-platform
License PHP License[3]
Usual filename extensions .php, .phtml .php4 .php3 .php5 .phps
Wikibooks logo PHP Programming at Wikibooks

PHP (PHP: Hypertext Preprocessor) is a scripting language that helps people make webpages more interactive, by allowing them to do more things.

A website programmed with PHP can have pages that are password protected. A website with no programming can not do this without other complex things. Standard PHP file extensions are: .php .php3 or .phtml, although a webserver can be set up to use any extension.[4][dubious ]

Its structure was influenced by many languages like C, Perl, Java, C++, and even Python. It is considered to be free software by the Free Software Foundation.[5]

Wikipedia, which runs on MediaWiki, uses the PHP scripting language.

History[change | change source]

PHP was first created by a man called Rasmus Lerdorf in 1995.[6] It is now developed and improved by a large team of people.

Example[change | change source]

An example Hello World program:

  echo "Hello, World!";

References[change | change source]

  1. 1.0 1.1 Rasmus Lerdorf began assembling C code originally written for CGI scripts into a library and accessing the library's functions, including SQL queries, through HTML-embedded commands in 1994; Lerdorf, Rasmus (2007-04-26). "PHP on Hormones - history of PHP presentation by Rasmus Lerdorf given at the MySQL Conference in Santa Clara, California" (mp3). The Conversations Network. Retrieved 2009-12-11. "Every day I would change the language drastically, and it didn't take very long, so by 1995, mid-1995 or so, PHP looked like this. This isn't that far from what PHP looks like today, actually."
  2. "PHP 5.6.10 is available". The PHP Group. Retrieved 5 July 2015.
  3. "Official PHP License Information". The PHP Group. Retrieved 21 April 2011.
  4. Retrieved on 30 October, 2007
  5. "GPL-Incompatible, Free Software Licenses". Various licenses and comments about them. Free Software Foundation.
  6. "History of PHP". The PHP Group. Retrieved 18 July 2011.

Other websites[change | change source]