prepared statements on loop and rollback if there are errors - php

Question

I was hoping someone would guide me in the right direction. What I am trying to accomplish is the following:
user uploads a csv file the data is then stored in a multidimensional array $formatted_payments. Then I check the records on the file against the records on the DB. I need to check if the route from the file matches the route on DB if it does for all records then commit all the updates but if there is one mismatch then i need to rollback all the update. I hope this all makes sense. Here is what I did but I haven't tested yet.
Thank you
$conn->autocommit(FALSE);
$route_errors = [];
foreach($formatted_payments as $val){
$sql = "SELECT id, account_no, payment_amount, route_id, payment_date FROM car_payments WHERE payment_date = '".$date."' AND account_no = '".$val['account_no']. "'";
$res = $conn->query($sql);
$data = $res->fetch_object();
if($data){
if($val['amount'] > 0){
if($val['route_id'] != $data->route_id){
$route_errors[] = $val['account_no'];
}else{
$sql = "UPDATE car_payments SET payment_amount = ? charged = ? WHERE id = ?";
$stmt = $conn->prepare($sql);
$stmt->bind_param("sss", $val['amount'], 'Si', $data->id);
$stmt->execute();
}
}else{
$sql = "UPDATE car_payments SET payment_amount = ? charged = ?, pending = ? WHERE id = ?";
$stmt = $conn->prepare($sql);
$stmt->bind_param("ssss", $val['amount'], 'No', 1, $data->id);
$stmt->execute();
}
}
}
if(!empty($route_errors)){
$conn->roll_back();
echo 'The following accounts do not match the route. Records not imported.<br>';
foreach($route_errors as $value){
echo '<li>' . $value . '</li>';
}
}else{
$conn->commit();
}