Re: [Phpgroupware-developers] what does this mean??

[Dan Kuykendall]

Thanks Michael! I was trying to remeber what this was supposed to do, 
and I knew I needed a bit result, but Ive been dealing with PHP4 too 
much these days.

Glad to see you show up on the list. You and forward thinking ideas are 
missed. Fortunatly most of what you tried teaching us has finally sunk 
in and its working well :-)

Dan

Michael Dean wrote:
> !! is a simple trick to force the result to a boolean.  The results of
> $rights & $required is not a boolean, but the result of a bitmask
> operation.  AFAIR, this is more significant in PHP3 than PHP4.  Run this
> script to see what I mean.  I refrained from testing with 1 and 1 since
> the full effect wouldn't be revealed.
>
> On Fri, 2002-10-11 at 18:14, Chris Weiss wrote:
>
> > What is "!!"?  I only see reference to ! as NOT, and !! seems to be NOT(NOT) or
> > basically no change.
>
>
>
> ------------------------------------------------------------------------
>
> $c0 $c1 $c2 $c3 $c4
> "); } function test_expr($i, $j) { tr( "$i & $j", $i & $j, ($i & $j) == 
> true ? 'Y' : 'N', !!($i & $j), !!($i & $j) == true ? 'Y' : 'N' ); } 
> tr('Expression', 'Result', 'Result == true', '!!Result', '!!Result == 
> true'); test_expr(8, 31); test_expr(8, 32); ?>