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Posted by Brent Baisley on 10/06/27 11:30
The foreach statement works because you are getting the array index
($k) to unset the array item. I think somewhere in the manual it says
it's unsafe because some people might think you could just use unset
($v) to unset the array item. Which wouldn't work because $v is more
of a temporary variable and not a reference to the array item.
On Oct 27, 2005, at 6:18 PM, Richard Lynch wrote:
> Somewhere in the manual (damned if I can find it now) it says (or used
> to say) that you can or can't safely do this:
>
> while (list($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.
>
> 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. :-)
>
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--
Brent Baisley
Systems Architect
Landover Associates, Inc.
Search & Advisory Services for Advanced Technology Environments
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