PHP Breif Intro

Hi every one!

First Of All History of PHP:

PHP was invented by Rasmus Lerdorf in 1995. He is known as Father of PHP. He started PHP as a replacement for various Perl scripts. He used PHP to maintain his personal web page. PHP takes most of its syntax from C, Java, and Perl. PHP was written in C programming language.

PHP – Server-Side Scripting Language

PHP is a server-side scripting language, which means that PHP scripts, or programs, usually run on a Web server. The process of running a PHP script on a Web server looks like this:

A visitor requests a Web page by clicking a link, or typing the page’s URL into the browser’s address bar. The visitor might also send data to the Web server at the same time, either using a form embedded in a Web page, or via AJAX (Asynchronous JavaScript And XML).

The Web server recognizes that the requested URL is a PHP script, and instructs the PHP engine to process and run the script.

The script runs, and when it’s finished it usually sends an HTML page to the Web browser, which the visitor then sees on their screen.

PHP – A Powerful Web Scripting Language

The interesting stuff happens when a PHP script runs. Because PHP is so flexible, a PHP script can carry out any number of interesting tasks, such as:

Reading and processing the contents of a Web form sent by the visitor

Reading, writing, and creating files on the Web server

Working with data in a database stored on the Web server

Grabbing and processing data from other Web sites and feeds

Generating dynamic graphics, such as charts and manipulated photos

PHP – A Great Choice for Web Applications

Web forums that allow visitors to post messages and discuss topics

Search engines that let people search the contents of a Web site or database

Straw poll scripts that enable visitors to vote in polls and surveys

Content management systems and blogs, which enable Webmasters to create sites easily with minimal technical knowledge

Webmail applications, allowing people to send and receive email using their Web browser

Online stores, allowing shoppers to purchase products and services over the Internet