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MyASPN >> Mail Archive >> php-general
php-general
Re: [PHP] foreach / unset
by John Nichel other posts by this author
Oct 28 2005 6:03AM messages near this date
[PHP] Re: foreach / unset | Re: [PHP] foreach / unset
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. ;)

>  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. :-)

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".

-- 
John C. Nichel
Ã?berGeek
KegWorks.com
716.856.9675
john@[...].com

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