On 14 Oct 2011 at 16:46, Tedd Sperling <tedd.sperling@xxxxxxxxx> wrote:
> On Oct 13, 2011, at 11:37 AM, Tim Streater wrote:
>> On 13 Oct 2011 at 16:25, Tedd Sperling <tedd.sperling@xxxxxxxxx> wrote:
>>> So, if you want a main script variable (i.e., $myVar) to be accessed by a
>>> function, you can do it by stating:
>>>
>>> myFunction
>>> {
>>> global $myVar;
>>> // and then using $myVar
>>> }
>>>
>>> or
>>>
>>> myFunction
>>> {
>>> $myVar = $GLOBAL['myVar']
>>> // and then using $myVar
>>> }
>>
>> But presumably these are not *quite* equivalent, as modifying $myVar will
>> change the global in the first but not in the second.
>>
>> --
>> Cheers -- Tim
>
> Tim:
>
> I see what you are saying, but the reason for that $myVar declared within the
> function is local to that function and will not change the value of $myVar in
> the main script -- as such, illustrating differences in scope.
Yes.
> But the reason for my post was to illustrate that IF one declares a variable
> in the main script THEN that variable will also be automagically included in
> the $GLOBAL array.
>
> In short, you cannot write a script without having a $GLOBAL array that
> contains every variable you create in the main script -- that is what I found
> surprising. YSMV (Your Surprise May Vary).
I suppose my reaction is more like hmmm, interesting. I use globals here and there, e.g. to keep argument lists from getting very long. But I never use the $GLOBAL array.
--
Cheers -- Tim
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