PHP: Ok php is sort of like html pages . You can use php pages as well as html pages . A description of php is:
QUOTE
The PHP Hypertext Preprocessor (PHP -- yes, the first "P" in the acronym does indeed stand for PHP!) allows web developers to create dynamic content that interacts with databases. PHP applications are normally found on Linux servers and in conjunction with MySQL databases. It provides those servers with functionality similar to that provided to the Windows platform by Active Server Pages technology.
People use php pages , you can use both php and html pages. php pages are much easier because you when making a layout you won't have to edit all your subpages like with html pages . to learn about php look here:
http://pootato.org/phphttp://pixelfx.orgIframes : Iframes are the same as divs . Iframes are using for positioning content. One good thing about iframes is that you can link pages into your iframe and when people visit your site and click a link to your subpages the page won't refresh like it would with divs. View the following sites for more iframe info.
http://pixelfx.orghttp://pootato.org/html/iframes/index.phpdev border: Do you mean div borders? im not sure what exactly that is so yea.