PHP Introduction


PHP is a server-side scripting language.

What You Should Already Know

Before you continue you should have a basic understanding of the following:
  • HTML/XHTML
  • JavaScript

What is PHP?

  • PHP stands for PHP: Hypertext Preprocessor.
  • PHP is a server-side scripting language, like ASP.
  • PHP scripts are executed on the server.
  • PHP supports many databases (MySQL, Informix, Oracle, Sybase, Solid, PostgreSQL, Generic ODBC, etc.)
  • PHP is an open source software.
  • PHP is free to download and use.
We use MySQL database in our tutorials.

What is a PHP File?

  • PHP files can contain text, HTML tags and scripts
  • PHP files are returned to the browser as plain HTML 
  • PHP files have a file extension of ".php", ".php3", or ".phtml" (usually we use .php).

What is MySQL?

  • MySQL is a database server.
  • MySQL is ideal for both small and large applications.
  • MySQL supports standard SQL (Structured Query Language).
  • MySQL compiles on a number of platforms.
  • MySQL is free to download and use.

PHP + MySQL

  • PHP combined with MySQL are cross-platform (you can develop in Windows and serve on a Unix platform)

Why PHP?

  • PHP runs on different platforms (Windows, Linux, Unix, etc.).
  • PHP is compatible with almost all servers used today (Apache, IIS, etc.).
  • PHP is FREE to download from the official PHP resource: www.php.net
  • PHP is easy to learn and runs efficiently on the server side.

Where to Start?

To get access to a web server with PHP support, you can:
  • Install Apache (or IIS) on your own server, install PHP, and MySQL
  • Or find a web hosting plan with PHP and MySQL support