On Tue, 2008-11-18 at 10:52 +0000, Nathan Rixham wrote:
> Ashley Sheridan wrote:
> > On Mon, 2008-11-17 at 18:01 -0500, Craige Leeder wrote:
> >> Ashley Sheridan wrote:
> >>> On Mon, 2008-11-17 at 17:47 -0500, Craige Leeder wrote:
> >>>
> >>>> Only thing to note with the foreach is that you are actually working on
> >>>> a copy of the array, so if you intend to modify it, pass it by reference.
> >>>>
> >>>> - Craige
> >>>>
> >>> Can you do that? I assume it would look like this:
> >>>
> >>> foreach(&$array as $a) {}
> >>>
> >> Close. It actually looks like this:
> >>
> >> foreach ($array as $key => &$value) {}
> >>
> >> This makes sense because for each iteration of the loop, PHP places a
> >> copy of the key in $key, and a copy of the value in $value. Therefor,
> >> you are specifying with this code that you want it to place a reference
> >> of the value into $value.
> >>
> >> - Craige
> >>
> >>
> >>
> > Ah, that could be very useful to know, thanks!
> >
> >
> > Ash
> > www.ashleysheridan.co.uk
> >
>
> foreach ($array as $key => $value)
>
> $value = a copy so won't change the original array
> $array[$key] = the original
>
> thus:
>
> foreach ($array as $key => $value) {
> $array[$key] = do_something_with($value);
> }
>
This is how I've always done it 'til now, but I think passing by
reference is a bit neater in its approach, and can be easier to read
when $value is itself an array or complex object.
Ash
www.ashleysheridan.co.uk
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