[Sussex] PHP4 - pointers and updates to a class

[sparkeh at btinternet.com]

> 	function fred(&$var) {...
> 
> Note the & (ampersand) in the formal parameter.
> 
> You can also assign by reference:
> 
> 	$x = 10;
> 	$y = &$x;

Also watch out for quirks such as that found when
using foreach:

$ar = array();
$x  = 10;
$y  = &$x;
$ar[] =& $x;
$ar[] =& $y;

foreach($ar as $k=>$v)
{
 // At this point:
 //   $ar[$k] refers to the original item
 //   $v is a *copy* of the original item 
}

-Mark