INCLUDE 'http://www.yoursite.com/path/to/file.php' ; //or
REQUIRE 'http://www.yoursite.com/path/to/file.php' ;
Some of the most common uses for these commands include holding variables that are used across multiple files or holding headers and footers. If an entire site's layout is housed in external files called with SSI, any changes to site design need only be made to these files and the entire site will change accordingly.
