[UPHPU] Accessing a Parent Object's Other Variables

[Justin Carmony]

The recursion warning happens because in theory, print_r goes through  
a prints out the values for an object. So it prints out everything in  
A, which includes a reference to B. So it prints out everything in B,  
which includes an A. So it prints everything in A, which has a B.....

So that function would run recursively. Have two objects with  
reference to each other isn't a problem, just that the print_r  
function will throw those recursions errors.

Justin


On Jun 22, 2009, at 12:57 PM, Kirk Ouimet wrote:

> Hi List,
>
>
>
> I need to be able to access a other variables in a parent class from  
> an
> object inside the parent class. Here's what I've cooked up, but it  
> throws a
> *RECURSION* warning:
>
>
>
> <?php
>
> Class A {
>
>    var $msg = 'Why hello there my old friend';
>
>    var $b;
>
>
>
>    function  __construct() {
>
>        $this->b = new B($this);
>
>    }
>
> }
>
>
>
> Class B {
>
>    var $a;
>
>    function __construct($a) {
>
>        $this->a = $a;
>
>    }
>
> }
>
>
>
> $a = new A();
>
> $b = $a->b;
>
> echo $b->a->msg;
>
> // Output: Why hello there my old friend
>
>
>
> print_r($a);
>
> /* Output:
>
> (
>
>    [msg] => Why hello there my old friend
>
>    [b] => B Object
>
>        (
>
>            [a] => A Object
>
> *RECURSION*
>
>        )
>
>
>
> )
>
> */
>
> ?>
>
>
>
> Is the *RECURSION* warning bad coding on my part? What's a best  
> practice
> here?
>
>
>
> Thanks!
>
>
>
> Kirk Ouimet
>
> <mailto:kirk at kirkouimet.com> kirk at kirkouimet.com
>
> Cell: (801) 310-1421
>
>
>
>
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