Owner or other; permissions for webpage users

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Newsgroups php.general
Message-ID <[email protected]>
I'm basically familiar with the UNIX permissions - 'owner', 'group', or 'other', but I
have no real idea how these apply to webpage users under PHP. I know that if I FTP to the
server I am the owner, and I think that if I, or anyone else, opens one of my webpages I
am 'other'.

However what I would like to do is assign certain users, who have logged in through a
security portal, to 'group', so that they (but not 'others') have permission to write to
data files on the site.

Can this be done with PHP?
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