通过AJAX从PHP返回值到JS

Question

What am I doing wrong? AJAX success appears not to be receiving anything at all as none of the three alerts are shown. The process works, except I do not get any response

jQuery.ajax({
  type: 'POST',
  url: 'https://xxxxxxxxxxx.com/charge.php',
  data: {
    tokenid: token.id,
    email: customer_email,
    amount: amount,
    description: customer_first_name + ' ' + customer_surname + ' | ' + reference
  },
  dataType: 'json',
  success: function(response) {
    alert(response);

    if (response == "OK") {
      alert('Payment successfully made! ');
    } else {
      alert('Payment could not be processed. Please try again.');
      location.reload();
    }
  }
});

<?php
  require_once('./stripe/config.php');

  $token  = $_POST['tokenid'];
  $email = $_POST['email'];
  $amount = $_POST['amount'] ;
  $description = $_POST['description'] ;

  $err = 'OK' ;

  $customer = \Stripe\Customer::create(array(
      'email' => $email,
      'source'  => $token
  ));

  try { 
    $charge = \Stripe\Charge::create(array(
      'customer' => $customer->id,
      'amount'   => $amount,
      'currency' => 'GBP',
      'description' => $description
    ));
  } catch(\Stripe\Error\Card $e) {
    $err = "Declined - $e";
  }

  function response() {
    global $err;
    print $err ;
    return $err;
  }
  exit response() ;
?>

Please help as this is driving me mad.

Answer 1

Remove the response function, do a print of the errors

 <?php
  require_once('./stripe/config.php');

  $token  = $_POST['tokenid'];
  $email = $_POST['email'];
  $amount = $_POST['amount'] ;
  $description = $_POST['description'] ;

  $err = 'OK' ;

  $customer = \Stripe\Customer::create(array(
      'email' => $email,
      'source'  => $token
  ));

 try { $charge = \Stripe\Charge::create(array(
      'customer' => $customer->id,
      'amount'   => $amount,
      'currency' => 'GBP',
      'description' => $description
  ));
    } catch(\Stripe\Error\Card $e) {
    $err = "Declined - $e";
    }
echo $err;
?>

set the dataType to text dataType: 'text',