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Introduction to PHP

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A PHP file may contain text, HTML tags and scripts. Scripts in a PHP file are executed on the server.


What You Should Already Know

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

  • HTML / XHTML
  • Some scripting knowledge

If you want to study these subjects first, find the tutorials on our Home page.


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 (OSS)
  • PHP is free to download and use

What is a PHP File?

  • PHP files may 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"

What is MySQL?

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

PHP + MySQL

  • PHP combined with MySQL are cross-platform (means that 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?

  • Install an Apache server on a Windows or Linux machine
  • Install PHP on a Windows or Linux machine
  • Install MySQL on a Windows or Linux machine

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Visit MaximumASP




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