01 – Introduction to PHP

What is PHP?

PHP is a server side scripting language and the letters PHP stands for “PHP: Hypertext Preprocessor”.
PHP is used to create dynamic and interactive websites.
PHP code is executed on the server and the result is returned to the browser as plain HTML.
PHP files have a “.php” extension.

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, and modify data in your database
PHP can be used to control user-access
PHP can encrypt data

With PHP you are not only limited to output HTML, you can output images, videos, and PDF files.

Popular social network facebook.com was built in PHP and WordPress a popular blogging system also use PHP at its core.

What you should already know?

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


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