Re: [PHP] Re: $this variable reference question

[Adam Reiswig]

Jason, thanks.  Yes, I understand your example here very well.  My 
question actually had more to do with understanding what value was added 
to the class by "$myref = &$this;".  Perhaps it is some misunderstanding 
I have of classes but, since a class is just a pattern and not an 
actual, usable object in and of itself, what is the value in equating a 
member variable with the class.  Almost seems recursive. Even though 
$myref is set to "global" it is still a member variable, right?  Does 
"$this" refer to the class pattern or is it creating an object of itself 
inside the class, sort of an object inside an object?  I guess my 
problem in understanding this is not so much where this sort of coding 
should be used but rather what is really going on here.  Thanks again!

-Adam Reiswig

Jason Barnett wrote:

It's not the same thing.  When an variable references an object then you 
can change either the original object or the new variable and you will 
be changing the *same* object, not a new one.  Maybe this example helps?

<?php

    class test {
        function test($val) {
            global $myref;
            $myref = &$this;
            $this->value = $val;
        }
        function printval() {
            echo "The value of this class is '{$this->value}' <br>";
        }
        function setval($val) {
            $this->value = $val;
        }
    }
$a = new test();
$b = &$a;
$c = new test();
$a->setval(22);
$b->setval(321);
$c->setval('A weird comment');
$a->printval(); // should see 321
$b->printval(); // should see 321
$c->printval(); // should see A weird comment
?>

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