[PHP-DEV] Re: [PHP-QA] RE: [PHP-DEV] Re: [PHP-QA] $obj = new foo() patch From: Andi Gutmans (andi <email protected>)
Date: 11/11/00

I will address the OO issues once I get through all of the mail.
Just a side note, global $a won't be changing it's behavior. At least not
until a new major PHP version. It would really break stuff now and in any
case, it's consistent with how the =& works. The fact that references
aren't pointers can be confusing but this is how it works.

Andi

At 01:01 PM 11/11/00 +0300, Kirill Maximov wrote:

> Hi again,
>
>Mike Heath wrote:
> > > If we want to force 'rich' OO design, let's wait until PHP 5.0. IMO,
> > > a few peoply will upgrade to 4.0.4 if they'll have to rewrite their code
> > > (possibly, a LOT of code).
> > > But, I think, core team understands importance of compatibility issue.
> > That's
> > > why Andi reversed the patch for now, isn't it? ;-)
> >
> > Well I have to agree with you there. There are a lot of OO features I
> would
> > love to see in PHP but I'm certainly not counting on them until future
> > versions. The problem (regarding Andi's patch) is that the expected
> > behavior of:
> >
> > <?php
> > class foo {
> > function foo($a) {
> > global $ListOfObjects;
> >
> > $this->a = a;
> > $ListOfObjects[] = &$this;
> > }
> >
> > $bar = new foo()
> > ?>
> >
> > would be that $ListOfObjects[0] and $bar referenced the same data. They do
> > not. This is very frustrating to many people are there are 5 or more bugs
> > in the bugs database pointing this out. I'm convinced this is a serious
> > issue and needs to be fixed. I can only pray that *some* fix will get into
> > PHP 4.0.4.
>
> Well, the only solution I can imagine in this case is to change the way
> how 'global' directive works.
> As far as I've understood, for now, if I declare
> variable as global, I just make it a reference to an element of $GLOBALS
> array (something like this: $a = &$GLOBALS['a']). Or something similar.
> So any code that assigns $a = &{something} will just change the local $a.
> So, the following code prints 5, not 6.
>
>function tt()
>{
> global $a;
> $a = 5;
> $b = 6;
> $a = &$b;
>}
>tt();
>echo $a;
>
> I'm afraid, I suppose it to be a bug, though I've never used references
> explicitly so far (most of my code is for PHP3). I think, 'global'
> shouldn't be implemented as references to $GLOBALS.
> And in this case, Andi's patch will work smoothly.
>
> >
> > (BTW -- regarding my explanation above concerning the difference between
> > global $foo and $GLOBALS['foo']. This example will still work since
> I'm not
> > changing the reference to $ListOfObjects just its array members.)
>
> Its clear ;)
>
> >
> > Regards,
> >
> > Mike
>
> With best regards,
> KIR 

---
Andi Gutmans <andi <email protected>>
http://www.zend.com/

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