PHP Knowledge

  • what is PHP
    •
  • What is PHP class
    •
  • Smarty PHP
    •
  • PHP Calendar
    •
  • PHP delete
    •
  • PHP count
    •
  • PHP Directory
    •
  • php echo
    •
  • php exec
    •
  • PHP explode
    •
  • PHP fopen
    •
  • PHP Form
    •
  • PHP get
    •
  • PHP If
    •
  • PHP list
    •
  • php login
    •
  • PHP LOOP
    •
  • PHP Random
    •
  • PHP Redirect
    •
  • PHP replace
    •
  • PHP session
    •
  • PHP sort
    •
  • PHP split
    •
  • php substr
    •
  • PHP Syntax
    •
  • PHP time
    •
  • PHP upload
    •
  • php URL
    •
  • PHP version
    •
  • PHP Cookie
    •
  • PHP Global
    •
  • php LDAP
    •
  • PHP list
    •
  • php strip
    •
  • PHP template
    •
  • php PEAR
    •
  • PHP md5
    •
  • PHP ini
    •
  • PHP FTP
    •
    More others

    Javascript
    CSS
    PHP

     

    PHP version

    PHP was conceived sometime in the fall of 1994 by Rasmus Lerdorf. Early non-released versions were used on his home page to keep track of who was looking at his online resume. The first version used by others was available sometime in early 1995 and was known as the Personal Home Page Tools. It consisted of a very simplistic parser engine that only understood a few special macros and a number of utilities that were in common use on home pages back then. A guestbook, a counter and some other stuff. The parser was rewritten in mid-1995 and named PHP/FI Version 2. The FI came from another package Rasmus had written which interpreted html form data. He combined the Personal Home Page tools scripts with the Form Interpreter and added mSQL support and PHP/FI was born. PHP/FI grew at an amazing pace and people started contributing code to it.

    It is difficult to give any hard statistics, but it is estimated that by late 1996 PHP/FI was in use on at least 15,000 web sites around the world. By mid-1997 this number had grown to over 50,000. Mid-1997 also saw a change in the development of PHP. It changed from being Rasmus' own pet project that a handful of people had contributed to, to being a much more organized team effort.

    PHP 3.0 was the first version that closely resembles PHP as we know it today. It was created by Andi Gutmans and Zeev Suraski in 1997 as a complete rewrite, after they found PHP/FI 2.0 severely underpowered for developing an eCommerce application they were working on for a University project. In an effort to cooperate and start building upon PHP/FI's existing user-base, Andi, Rasmus and Zeev decided to cooperate and announce PHP 3.0 as the official successor of PHP/FI 2.0, and development of PHP/FI 2.0 was mostly halted.

    One of the biggest strengths of PHP 3.0 was its strong extensibility features. In addition to providing end users with a solid infrastructure for lots of different databases, protocols and APIs, PHP 3.0's extensibility features attracted dozens of developers to join in and submit new extension modules. Arguably, this was the key to PHP 3.0's tremendous success. Other key features introduced in PHP 3.0 were the object oriented syntax support and the much more powerful and consistent language syntax.

    The whole new language was released under a new name, that removed the implication of limited personal use that the PHP/FI 2.0 name held. It was named plain 'PHP', with the meaning being a recursive acronym - PHP: Hypertext Preprocessor.

    By the end of 1998, PHP grew to an install base of tens of thousands of users (estimated) and hundreds of thousands of Web sites reporting it installed. At its peak, PHP 3.0 was installed on approximately 10% of the Web servers on the Internet.

    PHP 3.0 was officially released in June 1998, after having spent about 9 months in public testing.

    By the winter of 1998, shortly after PHP 3.0 was officially released, Andi Gutmans and Zeev Suraski had begun working on a rewrite of PHP's core. The design goals were to improve performance of complex applications, and improve the modularity of PHP's code base. Such applications were made possible by PHP 3.0's new features and support for a wide variety of third party databases and APIs, but PHP 3.0 was not designed to handle such complex applications efficiently.

    The new engine, dubbed 'Zend Engine' (comprised of their first names, Zeev and Andi), met these design goals successfully, and was first introduced in mid 1999. PHP 4.0, based on this engine, and coupled with a wide range of additional new features, was officially released in May 2000, almost two years after its predecessor, PHP 3.0. In addition to the highly improved performance of this version, PHP 4.0 included other key features such as support for many more Web servers, HTTP sessions, output buffering, more secure ways of handling user input and several new language constructs.

    Today, PHP is being used by hundreds of thousands of developers (estimated), and several million sites report as having it installed, which accounts for over 20% of the domains on the Internet.

    PHP's development team includes dozens of developers, as well as dozens others working on PHP-related projects such as PEAR and the documentation project.

    PHP 5 was released in July 2004 after long development and several pre-releases. It is mainly driven by its core, the Zend Engine 2.0 with a new object model and dozens of other new features. 

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     
  • Javascript |