Perhaps my question was not as succinct as it could have been.
Basically, can you think of a means through which to detect whether or not a
variable is currently present in multiple scopes.
IE:
<?php
$bob = "fish";
echo is_multiscoped($bob); //False
function something()
{
echo is_multiscoped($fish); //False
gloabal $bob;
echo is_multiscoped($bob);//True
}
function getJam($&ref)
{
echo is_multiscoped($ref);//True
}
$jim = "nothing special";
echo is_multiscoped($jim); //False
getJam($jim);
?>
On Tue, Feb 1, 2011 at 7:12 PM, Tommy Pham <tommyhp2@xxxxxxxxx> wrote:
> > -----Original Message-----
> > From: Brad Lorge [mailto:brad@xxxxxxxxxxxx]
> > Sent: Monday, January 31, 2011 9:53 PM
> > To: php-general@xxxxxxxxxxxxx
> > Subject: Detecting Multi-Scope Variables
> >
> > Hello All,
> >
> > I am new to the list so please be gentle :)
> >
> > I am working on a PHP framework and have run up against a functionality
> > hurdle which I keep falling at. Basically, I have three mechanisms which
> all
> > function in a similar way and require this functionality: templating,
> event
> > handling and "action handling". Within the core code of the application,
> as
> > is common with many applications with plugin architecture, I pass a
> number
> > of parameters to functions which have hooked into a particular "event".
> Part
> > of the mechanism is that parameters can be passed by reference to allow
> > for the listeners to make modifications.
> >
> > $username="bob";$account_type="ISV";$password="fishbum";
> >
> > register_action_listener('process_user', function($username,
> > $account_type, $password){$username.="." . $account_type;} // Or
> > whatever
> >
> > call_action('process_user', &$username, &$account_type, &$password);
> > //Result: $username == "bob.ISV"
>
> I think you meant to use [1].
>
> >
> > Now, what I am trying to do is establish a method to prevent the "hook"
> > functions from making changes by reference without reference explicitly
> > being passed to them by the calling code.
> >
>
> Perhaps you should review [2] and see if your logic works with your
> 'call_action'.
>
> > I have thought of a method which simply makes a copy of all the
> parameters
> > for each listener within call_action(), however what I would really love
> is a
> > function which returns whether or not the supplied variable is available
> in
> > multiple scopes or is in the original scope which it was initialized in.
> > Does anyone know of a way to achieve this?
> >
> > Regards,
> > Brad
>
> Happy coding,
> Tommy
>
> [1] http://php.net/call_user_func
> [2] http://php.net/references
>
>
>
