1. PHP Tutorial_1. Introduction to PHP, 1.php_1.php_PHP tutorial

1． PHP Tutorial_1. Introduction to PHP, 1.php_1.php

PHP is a server-side scripting language.

Before learning, you need to have a basic understanding of the following knowledge:

• HTML
• css

What is PHP?

• PHP stands for PHP:Hypertext Preprocessor
• PHP is a widely used open source scripting language
• PHP is a script executed on the server
• PHP is free to download and use

What is a PHP file?

• PHP files can contain text, HTML, JavaScript code and PHP code
• The PHP code is executed on the server and the results are returned to the browser in pure HTML
• The default file extension for PHP files is ".PHP"

What can PHP do?

• PHP can generate dynamic page content
• PHP can create, open, read, write, and close files on the server
• PHP can collect form data
• PHP can send and accept cookies
• PHP can add, delete, and modify data in your database
• PHP can restrict users from accessing some pages on your website
• PHP can encrypt data

With PHP, you are no longer limited to outputting HTML. You can output images, PDF files, and even Flash movies. You can also output arbitrary text, such as XHTML and XML.

Why use PHP

• PHP can run on different platforms (Windows, Linux, Unix, Mac OS X, etc.)
• PHP is compatible with almost all servers currently in use (Apache, IIS, etc.)
• PHP provides extensive database support
• PHP is free, you can download it from the official PHP resource: www.php.net
• PHP is easy to learn and can run efficiently on the server side

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