Re: [SMARTY-DEV] RE: [SMARTY] php5 Iterators.

FWIW, is_a is not available prior to PHP 4.2 so we would actually need
to implement it. The Pear compat library has what appears to be an
adequate BC implementation:
http://cvs.php.net/co.php/pear/PHP_Compat/Compat/Function/is_a.php?r=1.15

I can see why people want to overload foreach for object support under
PHP5 but I wonder if it might be a better idea to introduce a new tag
(say, forevery or onevery or something) even if just to keep the amount
of BC headaches and pitfalls to a minimum.

xo boots

--- Boris Bezrukov <[email protected]> wrote:

> George Miroshnikov wrote:
> 
> >Hello David,
> >
> >What about using instanceof operator?
> >It would raise parser error on php4, but my thought is all php5 code
> >could be (temporarily?) moved into separate plugin that will be
> >conditionally included if Smarty is being run on php5 box.
> >Or maybe use runtime functions to avoid parser error.
> >
> >I'm wondering, if is_a() is forward-compatible with interfaces?
> >
> Yes, it is. And it should be used.
> 
> >Monday, January 17, 2005, 10:45:01 PM, you wrote:
> >
> >DZ> Jochem,
> >
> >DZ> Someone posted a patch for this "problem" a couple of days ago
> on the
> >DZ> Developers list (this is where this discussion belongs to
> anyway, so I'm
> >DZ> crossposting there).
> >
> >DZ> I totally agree with you, we need the possibility to use
> iterators. The
> >DZ> point is we need to find a clean way to implement this without
> breaking BC.
> >DZ> If we just do an is_object() check, we will break BC because you
> actually
> >DZ> CAN loop over objects using foreach, it will return the property
> values (and
> >DZ> their names as keys). We cannot remove the array casting either
> because some
> >DZ> people might rely on the fact that their int, string, whatever
> gets
> >DZ> converted to a one-value array and they can loop over them.