[PHP-DEV] Re: [PHP-QA] $obj = new foo() patch From: Kirill Maximov (kir <email protected>)
Date: 11/10/00

Andi Gutmans wrote:
>
> Guys,
>
> I have submitted a patch to the Zend Engine which is considered
> experimental. It is supposed to fix the problem with the $obj = new foo()
> statement when the constructor of foo() assigns $this by reference to other
> symbol table entries. Basically, the Zend Engine will explicitly assign new
> foo() by reference to $obj because this is pretty much the only thing which
> makes sense in this case.
> NOTE: If you do $obj2 = $obj1 = new foo(), "$obj2 = $obj1" will still
> assign by value and not by reference.
> This patch is only meant to fix this problematic bug which has about 5
> entries in the bugs database.
> Please check it out. If there are any problems/concerns with this bug it is
> best to leave it out for 4.0.4 but it should not harm anyone's scripts.
> The following bugs are probably solved now: 6529, 6896, 7454, 7455, 7482
> Anyway, please grab a fresh CVS tree and check that your OOP code still
> works :)
> Thanks!
> Andi

This code doesn't work no more as it did before:

<?php
class B {
    function bb() {
        global $a;
        echo "b";
        $a->aa();
    }
}
class A {
    function aa() {
        echo "A";
    }
}

function t() {

global $a;
$a = new A;
$a->aa();

global $b;
$b = new B;
$b->bb();
}

t();
?>

Output should be AbA.
I get:

Ab
   Fatal error: Call to a member function on a non-object in
   /h/home/kir/public_html/a.php on line 18 

-- 

  With best regards,
  Kirill Maximov
  QA team.


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