How to convert into json object like array

Question

Mycode is given below:

// seatsToCancel=U23,L43,U12

      $tin='S4243534';         //Booking id

      $seatsToCancel=$_GET['seatsToCancel'];

      $seatArray=explode(",",$seatsToCancel);

      $seatCount=count($seatArray);

      $SeatsTocancel=implode ( '", "', $seatArray );

       $params = array(
                                    "tin"=>"$tin",
                                  "seatsToCancel"=>array($SeatsTocancel)
                         );

    echo $params=json_encode($params);

I want output like this:

{"tin":"S4243534" ,"seatsToCancel":["U23","L43","U12"]}

Answer 1

I assume your $seatArray is ["U23","L43","U12"] ?
In that case you can do like this:

$seatArray = ["U23","L43","U12"];

$finalarray = ["tin"=>$tin,"seatsToCancel" => $seatArray];

echo json_encode($finalarray); //{"tin":"S4243534","seatsToCancel":["U23","L43","U12"]}

Edited to add the new requirement from edited question

Answer 2

So I'm guessing that your seats to cancel are coming in as a comma-separated list from the URL. So all you need to do is explode() the GET parameter to turn it into an array, place it as the value to a key and json_encode() it.

ie

$seatsToCancel = explode(',', $_GET['seatsToCancel']);
$params = [
    'tin' => $tin,
    'seatsToCancel' => $seatsToCancel,
];
$paramsJson = json_encode($params);

That should get you the result you're after:

{"tin":"S4243534" ,"seatsToCancel":["U23","L43","U12"]}

You may want to consider what happens if the GET parameter is empty and whether or not you want any additional error checking.