Re: [RFC] [DISCUSSION] Improve null-coalescing operator (??) adding empty check (??:)

On Wed, Jan 17, 2018 at 7:28 PM, Lito <info@eordes.com> wrote: > No $foo ?: 'default' , it's only equivalent to (isset($foo) && $foo) ? > $foo : 'default' if $foo exists. > > Also PHP has added ?? as null-coalescing operator that works with > undefined variables/attributes/keys, my proposal is an improvement over > this one. > > I don't want to endorse usage of undefined variables, can be used in a > large set of situations, like object attributes, array keys, etc... > What is the use case for the ??: operator? Null-coalesce is very common, because undefined/null are typically used to signal default values. Using *any* falsy value to indicate a default value seems a lot more unusual and precarious to me, especially if you consider PHP's specific semantics around falsiness (with the string "0" being falsy). Nikita > On 17/01/18 19:17, Marco Pivetta wrote: > >> This: >> >> echo (isset($foo) && $foo) ? $foo : 'default'; >> >> Is equivalent to: >> >> echo $foo ?: 'default'; >> >> Please don't endorse usage of undefined variables. >> >