Enhance Your Site with PHP Includes
An external style sheet allows all of a site’s styles to be controlled from one point—which makes for very efficient page layout and design.
“PHP includes” can be used in a similar way to external style sheets, in that elements appearing on multiple pages can be controlled from one location. For example, it is common to have a menu on every page of a website. If you want to update that menu—such as adding a new menu item—it will be a nightmare to do this if you have to open every page on your site to alter each instance of that menu.
Typically, blogging software (like WordPress) and content management systems come with built-in RSS feeds that update automatically.
