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Date: Mon, 20 Jun 2011 13:48:08 +0200
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To: Derick Rethans <derick@php.net>
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Subject: Re: [PHP-DEV] foreach() for strings
From: robert@xarg.org (Robert Eisele)

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2011/6/20 Derick Rethans <derick@php.net>

> On Mon, 20 Jun 2011, Robert Eisele wrote:
>
> > foreach() has many functions, looping over arrays, objects and
> implementing
> > the iterator interface. I think it's also quite intuitive to use
> foreach()
> > for strings, too.
>
> > If you want to implement a parser in PHP, you have to go the way with for
> +
> > strlen + substr() or $x[$i] to address one character of the string.
>
> Yes, this sounds like a good addition to me. One question though, what
> to do with an object that implements __toString() ?
>

That's the question, maybe one must force __toString() via an explicit
string-cast:

foreach( (string) $obj as $k=>$v)


>
> > We could
> > overdo the functionality of foreach()
> > by implementing LVAL's, too, in order to access single bits but this is
> > really uncommon, even if the way of thinking could be, that foreach()
> gives
> > a single attribute of each value, no matter
> > if it's a complex object with the iterator interface or a primitive. What
> do
> > you think about this one? My point of view is, that foreach() is very
> > useful, which was acknowledged by many ppl via the comments of my
> article.
>
> I don't think we should do it for bits, as nothing in PHP really does do
> anything with that. If you want to do stuff with bits, I think the
> "bitset" package (http://pecl.php.net/package/Bitset) is the way
> forwards.
>

yep, i totally agree.

>
> cheers,
> Derick
>
> --
> http://derickrethans.nl | http://xdebug.org
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>

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