ok, now it's clear why i must use '|' instead of '+'.
i still couldn't get what happens with bits but you
don't have to explain more. i know that it's about
bitwise operators, and how they handle numbers. no!
ok! i just got it!
thank you again.
--- bob parker <[EMAIL PROTECTED]> wrote:
> Coupl
oh my god. here is an example.
$userLevels = array(
1 => 'Member',
2 => 'Admin',
4 => 'Writer',
8 => 'Expert');
$cat = 15;
for ($mask=1; $mask <= 64; $mask *= 2) {
if ( $mask & $cat ) {
print "Yes $mas
On Sun, 22 Sep 2002 01:10, you wrote:
> consider there are categories and these have IDs like
> below:
> 1, 2, 4, 8, 16, 32, 64...
>
> if some data belongs to more than 1 category for
> exemple 4 and 32, its category ID will be 36, the sum
> of cat. IDs.
> i guess this is used widely in programmin
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