Hi Andrew!
On Sat, 14 Jul 2001, Andrew Kirilenko wrote:
> Hello!
>
> I have following problem:
>
> <?
> $container = new ccontainer();
> $container->init();
> $container->test1->foo();
> $container->test2->foo();
> $container->test2->owner->test1->foo();
[*]
> $container->test1->owner->test2->foo();
>
> class ccontainer
> {
> function ccontainer()
> {
> }
>
> function init()
> {
> $this->test1 = new ctest(&$this);
> $this->test2 = new ctest(&$this);
> }
> }
>
> class ctest
> {
> function ctest(&$owner)
> {
> $this->owner = $owner;
> }
>
> function foo()
> {
> echo "test!<br>";
> }
> }
> ?>
>
> Output of this script is:
> --->
> test!
> test!
> test!
> Fatal error: Call to a member function on a non-object in c:\www\a.php on
> line 8
> <---
>
> How to solve this problem???
>
at the moment marked [*] you are using test1->owner
test1->owner is ccontainer *before* init() had the chance to set test2 to it,
so the class has no such property "test2".
try a print_r($container) right after $cointainer->init() to see what I mean.
actually, you will notice that test2->owner doesn't have test2 member too!
cause at the moment it was created, the ccontainer was incomplete
(the expression $this->test2 = new ctest (&$this) evaluates right-to-left)
a quick hack would be to have a circular reference, by saying:
$this->owner =& $owner; // note the & :)
but the way you create the classes seems just trouble. what exactly are you
trying to achive?
-- teodor
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