From Simple English Wikipedia, the free encyclopedia
Paradigmimperative, object-oriented, Procedural, reflective
Designed byRasmus Lerdorf
DeveloperThe PHP Group
First appeared1995; 28 years ago (1995)[1]
Stable release7.3.6 / May 30, 2019; 4 years ago (2019-05-30)[2]
Typing disciplineDynamic, weak
Implementation languageC
LicensePHP License[3]
Filename extensions.php, .phtml, .php4, .php3, .php5, .php7, .phps, .php-s, .phar
Major implementations
Zend Engine, Phalanger, Quercus, Project Zero, HHVM
Influenced by
C, C++, Java, Perl, Tcl[1]

PHP (PHP: Hypertext Preprocessor) is a scripting language that helps people make web pages more interactive by allowing them to do more intelligent, complex things. PHP code is run on the web server. It is called a preprocessor because it builds the information before sending it to the computer that visits the web page.

A website programmed with PHP can have pages that are password protected. A website with no programming cannot do this without other complex things. Standard PHP file extensions are: .php .php3 or .phtml, but a web server can be set up to use any extension.[4][5]

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.[6]

History[change | change source]

PHP was first created by Rasmus Lerdorf in 1995.[7] It is now developed and improved by a large team of people. Its name at first stood for Personal Home Page, but it was later changed to PHP: Hypertext Preprocessor; using its old acronym in the new name.

Example[change | change source]

An example Hello World program:

echo "Hello, World!";

It is common to put PHP code inside a HTML document, for example:

<!DOCTYPE html>
		<title>Hello World</title>
		<?= '<p>Hello World</p>'; ?>

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". The Conversations Network. Archived from the original (mp3) on 2019-01-06. Retrieved 2009-12-11.
  2. "PHP 7.3.6 Release Announcement". The PHP Group. Retrieved 30 May 2019.
  3. "Official PHP License Information". The PHP Group. Retrieved 21 April 2011.
  4. Retrieved on 30 October, 2007
  5. "Apache Module mod_mime AddHandler Directive". Retrieved 30 September 2015.
  6. "GPL-Incompatible, Free Software Licenses". Various licenses and comments about them. Free Software Foundation. Archived from the original on 2005-07-22. Retrieved 2007-11-03.
  7. "History of PHP". The PHP Group. Retrieved 18 July 2011.

Other websites[change | change source]