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Jun

WELCOME TO PHP!

Introduction to PHP

This tutorial will introduce you to PHP, a server-side scripting language you can use to make dynamic websites and web applications.

What You Should Already Know

Before you continue you should have a basic understanding of the following:

HTML
CSS
JavaScript

What is PHP?

PHP is an acronym for “PHP: Hypertext Preprocessor”
PHP is a widely-used, open source scripting language
PHP scripts are executed on the server
PHP is free to download and use

	PHP is an amazing and popular language!It is powerful enough to be at the core of the biggest blogging system on the web (WordPress)! It is deep enough to run the largest social network (Facebook)! It is also easy enough to be a beginner’s first server side language!

What is a PHP File?

PHP files can contain text, HTML, CSS, JavaScript, and PHP code
PHP code are executed on the server, and the result is returned to the browser as plain HTML
PHP files have extension “.php”

What Can PHP Do?

PHP can generate dynamic page content
PHP can create, open, read, write, delete, and close files on the server
PHP can collect form data
PHP can send and receive cookies
PHP can add, delete, modify data in your database
PHP can be used to control user-access
PHP can encrypt data

With PHP you are not limited to output HTML. You can output images, PDF files, and even Flash movies. You can also output any text, such as XHTML and XML.