Re: Is there limitation for switch case: argument's value?

2009/8/20 Keith <survivor_bus@hotmail.com>: > Hi, > I encounter a funny limitation here with switch case as below: > The value for $sum is worked as expected for 1 to 8, but not for 0. > When the $sum=0, the first case will be return, which is "sum=8". > Is there any limitation / rules for switch case? Thanks for advice! > > Keith Hi Keith, Try replacing 'switch($sum)' with 'switch(true)'. Note that unless you have very good reasons for using a switch statement like this, and know exactly why you're doing it, it's often better just to use it in the normal fashion. i.e.: switch ($sum) { case 8: break; case 7: case 6: break; case 2: case 1: break; case 0: break; default: break; } Some people like the syntax you've presented but honestly, there's usually a better way to do it. This is also somewhat faster too, although you may only notice the difference in very tight loops where you're counting every nanosecond. Regards, Torben > $sum=0; > switch($sum) > { >   case ($sum==8): >   echo "sum=8"; >   break; >       case ($sum==7 || $sum==6): >       echo "sum=7 or 6"; >       break; >   case ($sum==2 || $sum==1): >   echo "sum=2 or 1"; >   break; >       case 0: >       echo "sum=0"; >       break; >   default: >   echo "sum=3/4/5"; >   break; > } > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > >