Stripe API (PHP) & Parse - php

Question

I am building an app on iOS in swift and I am accepting payments using stripe. I have created a form that creates a customer and upon a successful save I call back the customerID and save it into my Parse Database.
Below is the code for the above:
XCODE:
let myCustomerID = user!.valueForKey("secretID") as! String
self.sendTokenToServer(myCustomerID, myAmount: cost)
func sendTokenToServer(aCustomer: String, myAmount: String) {
var theamount = myAmount
// SEND REQUEST TO PHP FILE IN WEBSERVER
let url = NSURL(string: ".../cutomeragain.php")
var request = NSMutableURLRequest(URL: url!)
request.HTTPMethod = "POST"
let body = "custID=\(aCustomer)&amount=\(theamount)"
request.HTTPBody = body.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: true)
// SEND ASYNCHORNOUS REQUEST
NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue()) {
(response, data, error) -> Void in
if error == nil {
}
}
When I go to charge the customer by ID, it does not accept the charge. Below is the PHP code:
<?php
require_once('stripe-php/init.php');
\Stripe\Stripe::setApiKey('xxx');
// Get the credit card details submitted by the form
$amount = $_POST['amount'];
$customerId = $_POST['custID'];
$cutomer = \Stripe\Customer::retrieve('custID');
// Charge the Customer instead of the card
$charge = \Stripe\Charge::create(array(
"amount" => $amount,
"currency" => "usd",
"customer" => $customerId)
);
// create a json output with completion variable, (this will be read from the ios app as response)
$json = array(
'completion' => 'done',
'completion1' => $cutomerId,
'ok' => $cutomer-id
);
echo json_encode($json);
?>
Am I missing something in my PHP file? I've tried a number of different methods. I.e. retrieving the customer from Stripe using

Answer 1

Ok so I figured it out. I had to play around a bit, however, I think that someone else will find this useful.
In my xcode file I changed
let myCustomerID = user!.valueForKey("secretID") as! String
to
let myCustomerID = user?["secretID"] as? String
In my PHP file I changed the code to the following:
// Get the credit card details submitted by the form
$amount = $_POST['amount'];
$customerId = $_POST['cus'];
$cu = \Stripe\Customer::retrieve($customerId);
// Charge the Customer instead of the card
$charge = \Stripe\Charge::create(array(
"amount" => $amount,
"currency" => "usd",
"customer" => $customerId,)
);
// create a json output with completion variable, (this will be read from the ios app as response)
$json = array(
'completion' => 'done',
'completion1' => $cutomerId,
'ok' => $cutomer-id
);
echo json_encode($json);
?>