[PHP] Passing by reference, assigning by reference?

[Alex Gemmell]

Hi sports fans!

I have a quick "references" related question.
Ok, I'm passing a Page object by reference to another object:

myClass->myFunction($objPage);

What I want to do is store that Page object as part of the myClass 
object (see definition code below).

My question is this: When assigning the Page object to be a variable of 
the myClass object do I store a reference to it or a copy of the reference?

class myClass()
{
        var $objPage;

        function myFunction(&$objPage) {
                // this way (a reference to the reference?):
                $this->objPage =& $objPage;

                // or this way (a copy of the reference?):
                $this->objPage = $objPage;

                // code, code, code...
        }
}

Is there much difference?  Does it really matter?  I'm unsure if this is 
efficient or not.

Can someone please shed some light on this.

Thanks!

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