Well my initial requirement was for
class Result {
...
function field($f) {
#ifdef DEBUG
assert(key_exists($f, $this->record));
#endif
...
}
}
But more generally, IMHO something being set with a value of null is
something different from it not being set at all. If that's not true, then
foreach/each need to be altered to skip over keys that have a null value.
However I find it quite useful to be able to use null as a distinct value.
David
--
|> /+\ \| | |>
David Croft
Infotrek
On Mon, 30 Apr 2001, Zeev Suraski wrote:
> Why? It's only interesting if you're trying to understand the table schema
> from one of the arrays. The right way to do it (IMHO) would be by querying
> the result using the field fetching functions...
>
> Zeev
>
> At 13:12 30/4/2001, David Croft wrote:
>
> >mysql_fetch_array (and probably others) return a key with 'null' as the
> >value if the field is null. This is distinct from that field not having
> >been returned at all/not existing.
> >
> >--
> >|> /+\ \| | |>
> >
> >David Croft
> >Infotrek
> >On Mon, 30 Apr 2001, Zeev Suraski wrote:
> >
> > > Why would you care if a key exists and is null? In general the behavior is
> > > so close to isset() that it's annoying to have to introduce a whole new
> > > function just for this difference.
> > >
> > > Zeev
> > >
> > > At 04:50 30/4/2001, David Croft wrote:
> > >
> > > >There doesn't seem to be any way for a php script to determine whether a
> > > >given key exists in an array. isset($arr['x']) fails when it exists but
> > > >has a null value. I know there are ways around it like using foreach or
> > > >array_keys but these don't seem very efficient.
> > > >
> > > >I would like to add a function key_exists, with the following proto:
> > > >
> > > >bool key_exists(array search, string key)
> > > >
> > > >Please let me know if this is inappropriate or I have missed something
> > > >obvious, otherwise I shall add this tomorrow. Thanks,
> > > >
> > > >David.
> > > >
> > > >--
> > > >|> /+\ \| | |>
> > > >
> > > >David Croft
> > > >Infotrek
> > > >
> > > >
> > > >--
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> > > --
> > > Zeev Suraski <[EMAIL PROTECTED]>
> > > CTO & co-founder, Zend Technologies Ltd. http://www.zend.com/
> > >
> > >
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> > >
> > >
>
> --
> Zeev Suraski <[EMAIL PROTECTED]>
> CTO & co-founder, Zend Technologies Ltd. http://www.zend.com/
>
>
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