[dev] CODING_STANDARDS / isset()

[Jan Schneider]

Quoting Marko Djukic <marko at oblo.com>:

> this seems to be a bit confusing:
> (line 512)
> d. Use array_key_exists() when you want to check if an array key is
> defined but it's OK if the value is false or null:
> 
> which seems to imply that in difference to the previous ways for testing
> a
> variable, this one also accepts false as a value.
> 
> when:
>   $t['param'] = false;
>   var_dump(isset($t['param']));
> 
> gives the result 'true', meaning isset() does detect an array key having
> the
> value false, and we do not have to rely on array_key_exists for these
> situations. so the only difference would be that array_key_exists() would
> also
> accept NULL as a value and still determine that an array key is defined.
> 
> committed a variation, if the way i understood things is ok.

Makes sense to me.

Jan.

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