In message <[EMAIL PROTECTED]>, Jim
MacDiarmid <[EMAIL PROTECTED]> writes
>
>
>I'm trying to roll my own CMS and have an integer field in my user database
>that I want to be able to set bits or turn on and off flags based on what
>permissions the user or group has. My test code is below but doesn't seem
>to be working for comparison purposes to see if a user has a particular
>permission.
>Has anyone done anything like this in PHP? Any ideas what I'm doing wrong?
>
>define('PERM1', 1);
>define('PERM2', 2);
>define('PERM3', 4);
>define('PERM4', 6);
>define('PERM5', 8);
>define('SOME_PERMS', PERM1 | PERM3 | PERM4 | PERM5); // should be 19
>define('ALL_PERMS', PERM1 | PERM2 | PERM3 | PERM4 | PERM5);
>
>$flags = ($flags | SOME_PERMS);
>echo $flags . "<BR>";
>echo ( $flags & PERM2 );
This is something that I have never tried in this context, but the bits
are not
1,2,4,6,8
but
1,2,4,8,16
Also, you might get some ideas from
http://www.shawnolson.net/a/601/
who only goes as far as
1,2,4,8 (no 16, but the principle is the same)
--
Pete Clark
http://www.hotcosta.com
http://www.spanishholidaybookings.com
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