Switch Statement and Identical Match

[HeidiR]

I am using a switch statement to test the return on a function. The function can return TRUE, FALSE or -1 for an error. It appears that the switch statement uses == instead of === for the compare as TRUE and -1 (both non zero values) execute the same TRUE case statement. Is there a way around this? Example below.

switch(x()){

case TRUE:
echo("T");
break;

case FALSE:
echo("F");
break;

case -1:
echo("Error");
break;

}

[NogDog]

One way:

$x = x();
switch(true) {
   case ($x === true) :
      // do stuff;
      break;
   case ($x === false) :
      // do stuff;
      break;
   case ($x === -1) :
      // do stuff;
      break;
   default:
      // Oops!
}

[bradgrafelman]

The alternative would of course be a series of if/elseif/else statements which, in my opinion, looks cleaner than a switch(true) structure.

[laserlight]

I suggest that you use an if-else chain instead of a switch, e.g.,

<?php
$x = x();
if ($x === true) {
    echo 'T';
} elseif ($x === false) {
    echo 'F';
} else {
    assert($x === -1);
    echo 'Error';
}

[NogDog]

Or, you could even invert things a bit:

switch( (int) x() ) {
   case 1:
      // true result
      break;
   case 0:
      // false result
      break;
   case -1:
      // -1 result
      break;
   default:
      // oops!
}

[HeidiR]

NogDog;10969594 wrote:

Or, you could even invert things a bit:

switch( (int) x() ) {
   case 1:
      // true result
      break;
   case 0:
      // false result
      break;
   case -1:
      // -1 result
      break;
   default:
      // oops!
}

Thanks guys. I appreciate the suggestions. The type cast option " (int) x()" looks interesting. I'll give it a try.