John Nichel wrote:
>  Richard Lynch wrote:
>  
> > Somewhere in the manual (damned if I can find it now) it says (or used
> > to say) that you can or can't safely do this:
> >
> > while (list($k, $v) = each($array)){
> >   if (...) unset($array[$k]);
> > }
> >
> > I don't even remember if it's safe or not, but I swear I saw it not
> > that long ago...
> >
> > Anyway, can you do *this* safely as a DOCUMENTED FEATURE:
> >
> > foreach($array as $k => $v){
> >   if (...) unset($array[$k]);
> > }
> >
> > I'm sure I could test it and maybe find out if "it works" but is it
> > documented behaviour I can rely on?  I'm sure not finding this in the
> > manual now that I go looking for it, though I know I saw it there
> > before.
>  
>  
>  I would *think* (just my opinion without much thought on a Friday 
>  morning) that this would/could be unsafe _if_ it was a for loop on a 
>  numerical indexed array.  Of course, my thinking may change after my 
>  first bottle of Dew. ;)

this function might change your mind (I take it you have had your Dew by now :-):

     function resolveArgs($args)
     {
         $args = array_values($args);

         for ($i = 0; $i < count($args); ++$i) {
             while (isset($args[$i]) && is_array($args[$i])) {
                 array_splice($args,$i,1,array_values($args[$i]));
             }
         }

         return $args;
     }

basically it flattens a multidimensional array - i use it for handling DB query
arguments (makes it easier to pass around args whilst build highly dynamic queries)

so intrinsically its not unsafe to manipulate the array - only you have the potential
to shoot yourserlf in the foot :-) then again both Richard and John have more than enough
skills to do that anyway ;-)

>  
> > PS
> > I'm being dragged kicking and screaming into using this new-fangled
> > 'foreach' thing instead of while/list/each, and I don't really care
> > for it so far. :-)

new-fangled is putting the boat out a bit thought :-) it's been around since 4.0,
I guess your looking forward to being able to use foreach to iterate over php5 object ;-)

>  
>  
>  For the longest time, I hated foreach.  Looked at other people's code 
>  who used it, and just wanted to strangle them.  However, I was sorta 
>  forced into it about 8 months ago, and now I'm in the camp of, "Damn, I 
>  really like this".

:-)

>  

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