php
 

Is it nescessary to install Apache in my Slackware 12.2.
Or I can directly access *.php files.

If I have to install Apache, then where to get it?
How to install it in SlackWare and how to configure it?

it is not neccessary to install apache, however you need to install PHP packages to execute PHP files.


If you want to install apache, check out httpd.apache.org. But note that even if you install apache, you will still have to install PHP. Check out www.php.net for more info.

You could also use php for administration of your system:
http://www.php-cli.com/

re
 

When I save text file, its icon changes and becomes the icon of php,
but if I open the file with web browser the screen id blank. I think I have to install apache server

If you want to use it for system administration - see the link above. However, as far as I know, if you want php to be executed in a web browser you'd normally need a server like apache as PHP (unlike javascript, CSS, etc) runs on the server side and passes the result to a browser.

xampp
 

I'm using xampp in my XP, I'm thinking to install it in my slackware also.
But I'm not getting installation file in .tgz format.

Is it possible to install it from source file?

Do you need the source code? They seem to provide a tarball which you just extract, which is all you have to do. See http://www.apachefriends.org/en/xampp-linux.html#374.