includes, requires, loading? help!

[Mo Money]

Is it ok to have an include within an include, or will that slow your page down to much. For example: include header.php and within header.php for the nav section you include navigation.php. Is this ok?


Also, what is the difference between: include, require, require_once ?

[Mike]

Yes, you can have includes inside includes.

http://www.php.net/include
http://www.php.net/require
http://www.php.net/require_once

The manual does a nice job of explaining them.