converting my sql query to pdo, but insert is not working

Question

i tried to convert my sql to pdo to be more safe but i dont know why my insert sql is not working, but the code is exactly the same with the example i got, but nothing happen when i use this code, there is no also error in console so i dont know what to do now.

here is my code

include 'C:\\Users\\Ace\\Sites\\db.php';

session_start();

$result =$pdo->query("SELECT * FROM tblrv  WHERE ID='" . $_GET['id'] . "'");
$row = $result->fetch(PDO::FETCH_BOTH);

if(count($_POST)>0) {
    
    
$rvno = $_POST['id'];
$c = $_POST['cash'];


if($rvno == "" && $_POST['name'] != ""){
    


$sql = "INSERT INTO tblrv (RVID, RVDate, Name, ContactNumber, SumInWords, RespectOf, Total, Cash, BankName, ChequeNumber, ChequeDate, CCref, BankTranRef, ChequeRef, Remarks, PreparedBy, ReceivedBy) 
VALUES (:rvid, :rvdate, :name, :contactnumber, :suminwords, :respectof, :total, :cash, :bankname, :chequenumber, :chequedate, :ccref, :banktranref, :chequeref, :remarks, :preparedby, :receivedby)";
$stmt=$pdo->prepare($sql);

$data = [
    ':rvid' => $_POST['rvid'],
    ':rvdate' => $_POST['rvdate'],
    ':name' => $_POST['rvname'],
    ':contactnumber' => $_POST['contactnumber'],
    ':suminwords' => $_POST['suminwords'],
    ':respectof' => $_POST['respectof'],
    ':total' => $_POST['total'],
    ':cash' => $_POST['cash'],
    ':bankname' => $_POST['bankname'],
    ':chequenumber' => $_POST['chequenumber'],
    ':chequedate' => $_POST['chequedate'],
    ':ccref' => $_POST['ccref'],
    ':banktranref' => $_POST['banktranref'],
    ':chequeref' => $_POST['chequeref'],
    ':remarks' => $_POST['remarks'],
    ':preparedby' => $_POST['preparedby'],
    ':receivedby' => $_POST['receivedby']
];

$x = $stmt->execute($data);

if($x)
    {
 echo '<script>
alert("New Record Successfully Added");
window.location.href="form";
</script>';
exit(0);
    }
else {
    '<script>
alert("ERROR");
</script>'; }

Thank in advance for the help guys

FIX Thanks