Xtreme Coder

PHP is a recursive acronym for Hypertext Preprocessor. PHP stands for PHP: Hypertext Preprocessor, with that PHP standing for Personal Home Page [Tools].
PHP  is an open-source language, used primarily for dynamic web content and server-side applications.
 It is often pointed to as the main competitor with:

• Microsoft's C# - Visual Basic.NET - ASP family,
• Sun's Java - JSP
• Macromedia's ColdFusion
• CGI - Perl

It is a server-side scripting language whose main purpose is to generate the HTML code, which can be viewed by the client. As such, the PHP code itself is not visible to the clients (i.e., if you do a "view source" in your web browser, you cannot see the PHP code. You can only see the resulting HTML code). This contrasts with client-side languages such as Javascript, which is visible to the client.
PHP was first created by Rasmus Lerdorf in 1995, and saw its first official release in 1997. Milestone releases included PHP 3 in 1998, PHP 4 in 2000, and PHP 5 in 2004. Today, many large-scale websites run on PHP. The author was first introduced to PHP in 2000, and have found the language to be pretty easy to work with.
Below is a simple "Hello World" program, PHP flavor:

<?php   print "Hello World."; ?>

Executing this program on a web server enabled with PHP produces the following output:

Hello World.

PHP programs usually have an extension of .php.
By the end of this tutorial, you should have a good understanding of the basic constructs of PHP, as well as how PHP can interact with MySQL to produce dynamic web pages.

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