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phpswitch-statementinfinity

PHP check infinity inside switch

The following code:

switch ($value) {
    case INF: $x = 'INF';
        break;
    case -INF: $x = '-INF';
        break;
    case NAN: $x = 'NaN';
        break;
    default: break;
}

doesn't work as I expected. I know that there are functions like is_infinite() but am I able to check variable infinity inside a switch statement?

My input can be any simple value (i.e. not an array and not an object). Could be integer, float, string, whatever.

Solution

  • am I able to check variable infinity inside a switch statement?

    No. Switch statements work with constants, not with expressions.

    if (is_infinite($value) || is_nan($value)) {
  $x = (string)$value;
}

    It's less lines of code, too.