Re: [DISCUSSION] Make empty() a Variadic

Hi, On 13 February 2015 at 19:31, Andrea Faulds <ajf@ajf.me> wrote: > > > On 13 Feb 2015, at 11:16, Andrea Faulds <ajf@ajf.me> wrote: > > > > Hey, > > > >> On 13 Feb 2015, at 07:28, Michael Wallner <mike@php.net> wrote: > >> > >> On 12/02/15 19:55, Thomas Punt wrote: > >> > >>> I'd like to propose to make empty() a variadic, where if any > >>> arguments passed in are considered empty, then false is returned > >> > >> Should that read "if any arguments passed in are considered *NOT* empty, > >> then false is returned"? > > > > No, I think it's correct, if confusingly phrased. I believe Thomas is > proposing variadic empty() where TRUE is returned if any of its arguments > are empty, otherwise FALSE. So, empty($a, $b, $c) would be equivalent to > empty($a) || empty($b) || empty($c), much like isset($a, $b, $c) is > equivalent to (and implemented as) isset($a) && isset($b) && isset($c). > > Wait, I think I made a mistake. > > * Thomas proposed "if any arguments passed in are considered empty, then > false is returned", i.e. !(empty($a) || empty($b) || empty($c)) if his > words are taken literally. This doesn't make much sense, I think it was a > mistake. > * You suggested he may have meant "if any arguments passed in are > considered *NOT* empty, then false is returned", i.e. (empty($a) && > empty($b) && empty($c)) > * I assume Thomas actually meant "where if any arguments passed in are > considered empty, then *true* is returned", i.e. (empty($a) || empty($b) || > empty($c)) > > Sorry for the confusion. > > I think the || behaviour is the most useful, as it's the analogue of > isset's. So !empty($a, $b, $c) would work similarly to isset($a, $b, $c), > and similarly, !isset($a, $b, $c) would work similarly to empty($a, $b, $c). > For example: echo $a, $b, $c, & empty($a, $b, $c), they are treated equal, if the empty() means if any one of them is empty then result is TRUE, the advantage of it disappeared: if (empty($a, $b, $c)) { // you might want to check it again. if (empty($a)) { //blah blah. } else if (empty($b)) { } } > > But that's just my opinion. :) > -- > Andrea Faulds > http://ajf.me/ > > > > > > -- > PHP Internals - PHP Runtime Development Mailing List > To unsubscribe, visit: http://www.php.net/unsub.php > > -- Reeze Xia http://reeze.cn