Re: empty list removed

Hi!

On 05.07.2021 at 08:48, Karoly Negyesi wrote:

> 3ae0b14dd0 removed the list of empty things.
>
> The documentation now says "A variable is considered empty if it does not
> exist or if its value equals false." Great, and which values do that?
>
> The commit message says: "To avoid duplication, we refer to falsey values
> instead."
>
> If this is a duplicate, we need to link to the list where it exists. If it
> is only a duplicate of scattered information all around and the list
> doesn't exist anywhere, this commit needs to be reverted and "SimpleXML
> objects from empty tags" added to the list. I would vastly prefer this one
> but I am not here to start an edit war. Let's discuss first :)

The documentation (<https://www.php.net/empty>) states:

| Returns false if var exists and has a non-empty, non-zero value, aka
| falsey, see conversion to boolean. Otherwise returns true.

"Conversion to boolean" links to
<https://www.php.net/manual/en/language.types.boolean.php#language.types.boolean.casting>,
and there is a list of values which are consired falsey, including
SimpleXMLElements.

Are we looking at different PHP manuals?

> Also, if those objects are worth a special case then
> https://www.php.net/manual/en/types.comparisons.php needs to be fixed too.
> And yes you can -- kind of -- glean the list of empty things from this page
> but it's a big mental effort.

Might be worth to add SimpleXMLElements there; OTOH, *any* internal
object could behave special in this regard.

Christoph