[snip] It might be best to not try and definitely declare what counts as
foreign data, because it's a sort of "everything else" type of thing. If
it doesn't originate within the PHP script itself, it is foreign.[/snip]

What about data from a database which is retrieved within the PHP
script? Would you consider this type of data to be internal (since it is
being accessed within php) or external (since the database is external
to php)?


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