[Sussex] PHP4 - pointers and updates to a class

[Colin Tuckley]

Steve Dobson wrote:

>     I want would like each node to have a reference (pointer) to 
>     its parent.

In a function you specify call by reference by declaring the function as:

	function fred(&$var) {...

Note the & (ampersand) in the formal parameter.

You can also assign by reference:

	$x = 10;
	$y = &$x;
	$y++;
	echo $x;
	echo $y;

This prints 11 twice since $y now points to $x.

Colin

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