NYCPHP Meetup

[Michael B Allen]

On Mon, 28 May 2007 08:55:39 -0400
Flavio daCosta <nyphp at n0p.net> wrote:

> Remember from the php manual: References in php are not like C pointers.
>  (they are symbol table aliases)
> 
> On 05/28/2007 12:20 AM, Michael B Allen wrote:
> <snip>
> > for ($i = 0; $i < 3; $i++) {
        unset($arr);
> >     $arr = array("a$i");
> >     $top[] = &$arr;
> >     $arr["key$i"] = "val$i";
> > }
> </snip>
> 
> So what that is saying is that $arr and $top[n] are both pointing to the
> same symbol table (or zval), so each iteration of your loop, you never
> /create/ a new zval, in the first line, you (re)assign new data in the
> zval which $arr points to. The second line keep pushing another
> reference to the same zval.
> 
> I usually do all my work to $arr first and then push a *copy* onto top,
> however, in order to get the effect of what you wanted "I want to be
> able to update elements in $arr after it has been added to $top", you
> could do something like assign the value into $top first, and then grab
> a reference to that value.

Hi Flavio,

Actually one way that I found that seems to work fine is to simply
unset($arr) at the top of the loop.

Thanks,
Mike

PS: Flavio is a cool name. I envision you as a cross between Flavor Flav
and Fabio (Yhea-boyieeee, I can't believe it's not butter.). Am I right?

:->

-- 
Michael B Allen
PHP Active Directory Kerberos SSO
http://www.ioplex.com/