Hello,
It's not really a question of which is faster, but which is better. In short: do not use include and require. Use only include_once and require_once. While the two perform similar functions, require_once will raise different errors.
According to PEAR, they should be used in the following ways:
require_once
Use if the file is being included unconditionally (i.e. not inside a conditional logic block).
include_once
Use when the file is being included under certain conditions.
I'm still not sure if this is just an implied formality or if includes really can be called conditionally with PHP. Recollection tells me whether inside a conditional block or not, each include file is still read when the page loads. This could be a corrupt ASP memory... Something to look into.
With your previous post, require_once outside of your function and pass the data from the file as additional arguments. Since the content of the file appears to be PHP code, use the php extension instead of txt. The array on that page will be available to your script once you include it.
Sorry for the long reply. I'm a little bored right now... :\
