Update default payment method for a customer with PHP

update_payment_method.php

<?php 
  // Check for a POSTed stripeToken
  if (isset($_POST['stripeToken'])){
    // Retrieve the customer id from your database/app, e.g.
    // $customer_id = $user->customer_id;
    try {
      $customer = \Stripe\Customer::retrieve($customer_id);
      $customer->source = $_POST['stripeToken']; // The token submitted from Stripe.js
      $customer->save();
      
      $success = "Your payment method has been updated.";
    }
    catch(\Stripe\Error\Card $e) {
      // Since it's a decline, \Stripe\Error\Card will be caught
      $body = $e->getJsonBody();
      $error  = $body['error']['message'];
    } 
    // Probably want to log all of these for later or send yourself a notification
    catch (\Stripe\Error\RateLimit $e) {
      $error = "Sorry, we weren't able tp update your payment method. Please try again.";
    } catch (\Stripe\Error\InvalidRequest $e) {
      $error = "Sorry, we weren't able tp update your payment method. We're looking into this now.";
      // Send yourself a notification, etc.
    } catch (\Stripe\Error\Authentication $e) {
      $error = "Sorry, we weren't able tp update your payment method. We're looking into this now.";
      // Send yourself a notification, etc.
    } catch (\Stripe\Error\ApiConnection $e) {
      $error = "Sorry, we weren't able tp update your payment method. Please try again.";
      // Send yourself a notification, etc.
    } catch (\Stripe\Error\Base $e) {
      $error = "Sorry, we weren't able tp update your payment method. We're looking into this now.";
      // Send yourself a notification, etc.
    } catch (Exception $e) {
      $error = "Sorry, we weren't able tp update your payment method. We're looking into this now.";
      // Send yourself a notification, etc.
    }
  }
?>