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PHP is a server side and widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML.
What is PHP?
- PHP stands for 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, etc.)
- PHP is an open source software
- PHP is free to download and use
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"
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
- Install MySQL
PHP Installation
Download PHP for free here: http://www.php.net/downloads.php
Download MySQL for free here: http://www.mysql.com/downloads/index.html
Download Apache for free here: http://httpd.apache.org/download.cgi
<html>
<body>
<?php echo "Hello World"; ?>
</body>
</html>
Each code line in PHP must end with a semicolon. The semicolon is a separator and is used to distinguish one set of instructions from another.
There are two basic statements to output text with PHP: echo and print. In the example above we have used the echo statement to output the text "Hello World".
