Re: How to detect classes with a count_elements handler in userland?
| From: | Christoph M. Becker | Date: | Mon, 14 Nov 2016 13:22:46 +0000 |
| Subject: | Re: How to detect classes with a count_elements handler in userland? | ||
| References: | 1 2 3 | Groups: | php.internals |
| Request: | Send a blank email to internals+get-96885@lists.php.net to get a copy of this message | ||
On 13.11.2016 at 22:10, Craig Duncan wrote:
>> How about just making those classes implement the interface instead?
>
> Christoph pointed out that there may be classes in extensions that use
> count_elements.
Furthermore, letting those classes implement Countable could break BC.
> Also it would make userland code simpler:
> is_countable($thing)
> vs
> is_array($thing) || $thing implements \Countable
Good catch!
Note that Craig has added is_countable() to PR #2185 (which implements
the RFC). In my opinion, that is okay, but if anybody has objections,
we probably need another RFC.
--
Christoph M. Becker