OK so I am trying to figure out if this is possible in php, I haven't had to do it before, and I haven't been able to find anything in the docs, or by googleing (maybe just not searching for it properly).

Let's say I have this bit of code. Pretty simple so far. One class that has a function that creates an instance of the 2nd class.

<?php


$myClass = new FirstClass();
$myClass->doSomething();

class FirstClass
{

    protected $myValue = null;

    public function printMyValue()
    {
        print $this->myValue;
    }

    public function doSomething()
    {
        $this->myValue="testing";
        $secondClass = new SecondClass()
        $secondClass->doSomething();
    }

}

class SecondClass
{
    public function doSomething()
    {
        // call FirstClass::printMyValue() here somehow....

    }
}

?>

What I am trying to figure out if I can do is from the function test2 in SecondClass can I call the printMyValue function in the Instance of Firstclass that instanciated the SecondClass object. I would like to do it without passing the FirstClass directly with $this. And I don't want to use FirstClass::printMyValye() as I lose the value passed in from FirstClass::doSomething()

Thanks,