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Posted by Jochem Maas on 10/19/63 11:30
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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