PHP 5 Introduction
PHP scripts
are executed on the server.
What You
Should Already Know
Before you
continue you should have a basic understanding of the following:
HTML
CSS
JavaScript
If you want
to study these subjects first, find the tutorials on our Home page.
What
is PHP?
PHP is an
acronym for "PHP: Hypertext Preprocessor"
PHP is a
widely-used, open source scripting language
PHP scripts
are executed on the server
PHP is free
to download and use
PHP is an
amazing and popular language!
It is
powerful enough to be at the core of the biggest blogging system on the web
(WordPress)!
It is deep
enough to run the largest social network (Facebook)!
It is also
easy enough to be a beginner's first server side language!
What
is a PHP File?
PHP files
can contain text, HTML, CSS, JavaScript, and PHP code
PHP code are
executed on the server, and the result is returned to the browser as plain HTML
PHP files
have extension ".php"
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, modify data in your database
PHP can be
used to control user-access
PHP can
encrypt data
With PHP you
are not limited to output HTML. You can output images, PDF files, and even
Flash movies. You can also output any text, such as XHTML and XML.
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