PHP

  • PHP: Hypertext Preprocessor is a server-side scripting language designed for Web development, but also used as a general-purpose programming language.

  • PHP is an "HTML-Embedded Scripting Language" primarily used for developing dynamic Web applications

  • PHP code can be interspersed with HTML, making it simple to generate dynamic pieces of Web pages on the fly.

  • As a scripting language, PHP code requires the presence of the PHP processor.

  • PHP code is normally run in plain-text scripts that will only run on PHP-enabled computers

  • PHP takes most of its syntax from C, Java, and Perl.

  • PHP is an open source technology and runs on most operating systems and with most Web servers.

  • PHP was written in the C programming language by Rasmus Lerdorf in 1994 for use in monitoring his online resume and related personal information.

  • Lerdorf combined PHP with his own Form Interpreter, releasing the combination publicly as PHP/FI (generally referred to as PHP 2.0) on June 8, 1995. Two programmers, Zeev Suraski and Andi Gutmans, rebuilt PHP's core, releasing the updated result as PHP/FI 2 in 1997.

  • The acronym was formally changed to PHP: HyperText Preprocessor, at this time.

  • In 1998, PHP 3 was released, which was the first widely used version. PHP 4 was released in May 2000, with a new core, known as the Zend Engine 1.0. PHP 4 featured improved speed and reliability over PHP 3.

  • In terms of features, PHP 4 added references, the Boolean type, COM support on Windows, output buffering, many new array functions, expanded object-oriented programming, inclusion of the PCRE library, and more.

  • Maintenance releases of PHP 4 are still available, primarily for security updates.

  • PHP 5 was released in July 2004, with the updated Zend Engine 2.0.

  • New features in PHP 5 are:

  1. Improved object-oriented programming

  2. Embedded SQLite

  3. Support for new MySQL features (see the image at right)

  4. Exception handling using a try..catch structure

  5. Integrated SOAP support (see the image at right)

  6. The Filter library (in PHP 5.1)

  7. Better XML tools

  8. Iterators

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