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Posted by Jerry Stuckle on 07/17/06 14:59
Bent Stigsen wrote:
> Tony Marston wrote:
>
>>
>> You can put a value into a variable without having to define the
>> variable beforehand. If you attempt to read from a variable that does
>> not yet exist then a ntice is generated. What's so difficult about that?
>
>
> It's quite clearly stated in the manual, no problem there. I just don't
> understand the choice of behavior.
>
> It is the concept of "isset", which I like to take literally.
> When I set the variable to null, causing the variable to appear in
> $GLOBALS, why should "isset" return false?
>
> I understand the behavior, not the choice.
>
Because null is not a value. It is specifically the *lack of a value*.
Therefore, the variable does not contain a value - it is not set.
>
> I don't know if I is incorrect use that flavours my opinion. Hardly a
> way to solve the lack of speed. It just isn't for number crunching.
> Scope-rules usually annoys me. Behavior of isset bugs me.
> This bugs me:
> $a = array(1,2,3);
> foreach($a as &$val) $val = $val * 2;
> foreach($a as $key=>$val) echo "$key = $val\n";
> Returns:
> 0 = 2
> 1 = 4
> 2 = 4
> Behavior by design, no problem, but I hate when I have to read the fine
> print in the manual, if I on top of that find it illogical, then it is a
> stinking pile of cow dung.
>
What's illogical about it? In order to get a value out of a variable,
you need to have put a value into that variable. Nothing illogical there.
--
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Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
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