i can not find the error in my code to move the image to the folder the folder is in the same location as the codes files details of the post:

i can not find the error in my code to move the image to the folder

the folder is in the same location as the codes files

if(isset($_POST["sub"]))
{

move_uploaded_file($_FILES["image"]["tmp_name"], "img/" . $_FILES["image"]["name"]);

$con = new mysqli("localhost", "root","", "voluntary");
$st = $con->prepare("insert into post(productName,productDetails,image,name) values(?,?,?,?)");
$st->bind_param("ssss", $_POST["pn"], $_POST["pd"],$_POST["image"],$_SESSION["name"]);
$st->execute();
echo ' window.location = "Provider.php"; ';

}

?>