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

This: echo (isset($foo) && $foo) ? $foo : 'default'; Is equivalent to: echo $foo ?: 'default'; Please don't endorse usage of undefined variables. On 17 Jan 2018 19:00, "Lito" <info@eordes.com> wrote: > Related with Request #75833 > https://bugs.php.net/bug.php?id=75833 > > From PHP 7 null-coalescing operator is a great option to avoid a previous > exists check with isset. > > But I think that this comaparison can be improved adding a ternary > operator like ??: and check also empty values. > > Example: > > -------------------------------------- > > <?php > > $foo = ''; > > // Current response with ternary operator > > echo $foo ?: 'default'; // 'defaut' > > // Current response with null-coalescing operator > > echo $foo ?? 'default'; // '' > > // Possible response with ternary null-coalescing operator > > echo $foo ??: 'default'; // 'defaut' > > // Same response with current PHP available code > > echo (isset($foo) && $foo) ? $foo : 'default'; // 'default' > > /** ------------------------------- **/ > > $foo = false; > > // Current response with ternary operator > > echo $foo ?: 'default'; // 'defaut' > > // Current response with null-coalescing operator > > echo $foo ?? 'default'; // false > > // Possible response with ternary null-coalescing operator > > echo $foo ??: 'default'; // 'defaut' > > // Same response with current PHP available code > > echo (isset($foo) && $foo) ? $foo : 'default'; // 'default' > > /** ------------------------------- **/ > > $foo = null; > > // Current response with ternary operator > > echo $foo ?: 'default'; // 'defaut' > > // Current response with null-coalescing operator > > echo $foo ?? 'default'; // 'defaut' > > // Possible response with ternary null-coalescing operator > > echo $foo ??: 'default'; // 'defaut' > > // Same response with current PHP available code > > echo (isset($foo) && $foo) ? $foo : 'default'; // 'default' > > /** ------------------------------- **/ > > unset($foo); > > // Current response with ternary operator > > echo $foo ?: 'default'; // PHP Notice: Undefined variable: foo > > // Current response with null-coalescing operator > > echo $foo ?? 'default'; // 'defaut' > > // Possible response with ternary null-coalescing operator > > echo $foo ??: 'default'; // 'defaut' > > // Same response with current PHP available code > > echo (isset($foo) && $foo) ? $foo : 'default'; // 'default' > > -------------------------------------- > > What about? > > Thanks! > Lito. > > -- > PHP Internals - PHP Runtime Development Mailing List > To unsubscribe, visit: http://www.php.net/unsub.php > >