Hiding passwords in PHP files

Hi all,
How can i protect the password in the php file from being read by other OS
users.
i tried chmod but it will not work if "other" does not have read privileges to
the file.
is there another way around this? i will have a few OS users on my box and i
dont want them to psql -U superuser dbname and do whatever, so i fixed that in
the pg_hba.conf file to request a password.. but now i need to supply a
password in the .php files to connect.
tried messing around with ident, could not get it working. gonna try again when
i come home tonight.. any suggestions?

thanks for any help

- bruce

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