Interesting. Thank you
On Thu, Sep 25, 2008 at 2:01 AM, Ford, Mike <M.Ford@xxxxxxxxxxxxxx> wrote:
> 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
> Email: m.ford@xxxxxxxxxxxxxx
> Tel: +44 113 812 4730
>
>
>
>
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