PHP Note Book...
Introduction of PHP(personel home page)
Introduction of PHP(personel home page)
•PHP stands for PHP: Hypertext Preprocessor
•PHP is a powerful tool for making
dynamic and interactive Web pages.
•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
PHP files:-
•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"
Basic PHP
Syntax
A PHP scripting block always starts
with <?php and ends with ?>. A PHP scripting block can be placed
anywhere in the document.
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
On servers with shorthand support
enabled you can start a scripting block with <? and end with ?>.
For maximum compatibility, we recommend
that you use the standard form (<?php) rather
than the shorthand form.
Syntax:-
<?php
Write code here…
?>
?>
Example
A PHP file normally
contains HTML tags, just like an HTML file, and some PHP scripting code.
<html>
<body>
<?php
echo "Hello World";
?>
</body>
</html>
<body>
<?php
echo "Hello World";
?>
</body>
</html>
MySQL
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 (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(internet information server), etc.)
•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
What do you Need?
If your server supports PHP you don't
need to do anything.
Just create some .php files in
your web directory, and the server will parse them for you. Because it is free,
most web hosts offer PHP support.
However, if your server does not
support PHP, you must install PHP.
Example
Example
<?php
$txt1="Hello World!";
$txt2="What a nice day!";
echo $txt1 . " " . $txt2;
?>
$txt1="Hello World!";
$txt2="What a nice day!";
echo $txt1 . " " . $txt2;
?>
Output
Hello World! What a nice day!
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