That would satisfy some of the requested feature, but try
calling ifsetor($my_array['bad key'], functionWithSideEffects()).
Marcus has repeatedly mentioned that the requested feature is
hard (bordering on impossible) to implement, but in the requested
feature (if I understand it (and it is what I would ask for too :) )),
there would be no error for using a key that isn't in the array,
there would be no side effect of creating a key in the array, and
if the $my_array['bad key'] actually did happen to be non-NULL,
the function with the side effects wouldn't get called.
That would be really handy, especially if it could take a variable
number of arguments. Using a standard name like coalesce would
be nice.
BTW, I have no weight around here; just thought I could help
clarify, having following this thread with interest...
- Todd
On Fri, 2004-07-09 at 12:07, Cris H wrote:
> Isn't this problem solvable with just a "User Space" function?
>
> <?php
>
> error_reporting(E_ALL);
>
> function ifsetor(&$variable, $alternate = NULL){
> if(isset($variable)){
> $tmp = $variable;
> echo('<p>$variable exists.</p>');
> }
> else{
> $tmp = $alternate;
> echo('<p>no $variable here.</p>');
> }
> return $tmp;
> }
>
> // no errors thrown ...
>
> $nonexistent = ifsetor($nonexistent);
> ifsetor($randomNonexistent);
>
> if($nonexistent !== NULL)
> echo('<p>$nonexistent is NOT NULL</p>');
> else
> echo('<p>$nonexistent is NULL</p>');
>
> ?>
>
> Because, as Derick Rethans mentioned, arguments passed by
> reference will not trigger the Undefined (variable | index)
> Notice at the point of the function call, and also PHP's C++
> style default arguments providing the alternate value, surely
> the above code would suffice?
>
> Apologies if I've completely misunderstood (with certainty a
> non-zero probability)...
>
> Regards,
>
> Cris
>
>
>
>
>
> ___________________________________________________________ALL-NEW Yahoo! Messenger
> - sooooo many all-new ways to express yourself http://uk.messenger.yahoo.com
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