09 Jul 06
31 Oct 08 2:39 am
PHP is a scripting language that can be used to create more dynamic webpages. For instance, we've got lessons here on how to use PHP to create dynamic menus for your website, and to create date scripts, and other stuff like that.
If you include any PHP code in your page, you need to save it as a .php page otherwise the PHP won't work. (Alternatively you can do some fancy trickery in your .htaccess file to make it work while keeping the .html extension, but anyway... ) You can use .php even if you don't use any PHP on your page.
It doesn't make a difference to your SEO or anything like that. Pick whichever one you like best!