如何在php中使用switch

Question

if (isset($_POST["submit"])){
$oride='';
$count = "25";
$origin = $_POST["origin"];
$destinataion = $_POST["destination"];
$oride = ($destination = $_POST["destination"] - $origin= $_POST["origin"]);

    switch (true) {
    case ($count<="0"):
    echo "invalid";
        break;

    case ($count==="15"):
    echo $count;
        break;

    case ($count==="16"):
    $total = $count + "1";
    echo $total;
        break;
    default:
        echo "hello";
}  }

The code will compute 1st then execute switch depending on what is the result of the computation. I tried if else but it will be too long because the case will go up to 130.

Answer 1

You must use the var $count in switch statement and the constant in case this way

   switch ($count) {
    case  "0" :
    echo "invalid";
        break;

    case "15":
    echo $count;
        break;

    case "16":
    $total = $count + "1";
    echo $total;
        break;
    default:
        echo "hello";
        break;
  }