Passing objects into classes

[zmanzman]

I'm trying to pass instances of classes into one another so that they can act upon each other, but it seems that PHP is not acting on the original instance of the class. can someone please tell me if there is a way to make this work?? (see code...)

<?
class class1{
var $outMsg;

function class1(){
	$this->outMsg = "";
}

}

class class2{
var $class1_instance;

function doSomething(){
	// do something...
	$this->class1_instance->outMsg = "NEW MSG";

}

}

$c1 = new class1();
$c1->outMsg = "OLD MSG";
$c2 = new class2();
$c2->$class1_instance = $c1;
$c2->doSomething();
echo $c1->outMsg; // returns "OLD MSG", should be "NEW MSG"

?>

Thanks,
Scott Zagar

[Anon]

$c2->$class1_instance = $c1;

should be:

$c2->class1_instance = $c1;

Diego

[zmanzman]

My bad, that was a typo... I changed it to this:

<?
class class1{
var $outMsg;

function class1(){
	$this->outMsg = "";
}

}

class class2{
var $class1_instance;

function doSomething(){
	// do something...
	$this->class1_instance->outMsg = "NEW MSG";

}

}

$c1 = new class1();
$c1->outMsg = "OLD MSG";
$c2 = new class2();
$c2->class1_instance = $c1;
$c2->doSomething();
echo $c1->outMsg; // returns "OLD MSG"

?>

... and it still doesn't work. I'm sure there's a way to do this... I'm rather new to PHP... any help would be appreciated, thanks

Scott Zagar

[Anon]

Do this:

$c2->class1_instance = &$c1;

You want to save a reference to $c1, not a copy of it.

Diego

[zmanzman]

That did the trick, thanks Diego!!!

... so when you give an object to another, without using "&" it gives a copy by default and not a reference... ok, that seems odd, but whatever works 🙂

-Scott