Re: mixing of asign() and assign_by_ref() overwrites external vars

--- Sebastian Mendel <[email protected]> wrote:
> Boots schrieb:
> 
> > [...]
> > It doesn't solve the problem: the original poster was mis-using the
> > feature.
> 
> :-(
> 
> i dont think so!
[..snip..]
> 
> $myvar = true;
> 
> var_dump($myvar);
> echo '<br />';

> $test = new Smarty;
> $test->assign_by_ref('myvar', $myvar);
> $test_2 = $test;
> $test_2->assign('myvar', false);
> 
> var_dump($myvar);
> echo '<br />';

I'm suggesting that you don't really want to use assign_by_ref. How is
this example any different than:

$mvar = true;
var_dump($mvar);
$mvar2 =& $mvar;
$mvar2 = false;
var_dump($mvar);

The whole point of assigning-by-reference is that you are aliasing the
variable as opposed to making a copy. When you assign $test_2 = $test,
even though you don't do it by-reference, you are making a copy of an
object that contains references. When you alter the reference (even in
the copy), you necessarily alter the original var. This is the way PHP
works and I don't think it implies any problems with the Smarty
semantics.

If you don't want that behaviour, don't use assign_by_ref. If you still
want to assign_by_ref, then work around PHP's behaviour in the usual
ways:

$myvar = true;
var_dump($myvar);
echo '<br />';

$test = new Smarty;
$test->assign_by_ref('myvar', $myvar);
$test_2 = $test;

// following is equivalent to unset($test_2->_tpl_vars['myvar'];
$test_2->clear_assign('myvar');

$test_2->assign('myvar', false);

var_dump($myvar);
echo '<br />';

xo boots


	
		
__________________________________
Do you Yahoo!?
Friends.  Fun.  Try the all-new Yahoo! Messenger.
http://messenger.yahoo.com/ 

-- 
Smarty Development Mailing List (http://smarty.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php