On 25 September 2008 03:45, VamVan advised:
> So guys,
>
> I found some thing strange that happened to me yesterday. Its small
but
> kinda freaked me out.
>
> So I have a tokenmap.php that I include include in different
configuration
> files. Some are classes and some are simple php files.
>
> So in my tokenmap.php I have declared an array as global.
>
> SO $GLOBAL['tokenmap'] = array()
>
> As a good programming practice what I did was:
>
> require_once('tokenmap.php');
> $tokenmap = array();
> $tokenmap = $GLOBAL['tokenmap'];
> print_r($tokenmap);
>
> The above displays empty array
>
> But when I do this , it works
>
> require_once('tokenmap.php');
> $tokenmap = $GLOBAL['tokenmap'];
> print_r($tokenmap);
>
> Its kind of wierd for me. I am trying to understand. Can some one shed
> some light on it for me.
Well, $GLOBALS['tokenmap'] is *exactly* *the* *same* *thing* as
$tokenmap when you're in the global scope (which I assume you are for
what you describe here to make sense). So the assignment:
$tokenmap = array();
is the same as:
$GLOBALS['tokenmap'] = array();
And the assignment:
$tokenmap = $GLOBALS['tokenmap'];
is essentially useless as it's the same as:
$tokenmap = $tokenmap;
... or:
$GLOBALS['tokenmap'] = $tokenmap;
... or even:
$GLOBALS['tokenmap'] = $GLOBALS['tokenmap'];
Cheers!
Mike
--
Mike Ford, Electronic Information Developer,
C507, Leeds Metropolitan University, Civic Quarter Campus,
Woodhouse Lane, LEEDS, LS1 3HE, United Kingdom
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