PHP curl - 从 API 获得响应

Question

So, I'm pretty much a beginner when it comes PHP curl/json. I've made pretty good progress with the integration of the Pinpayments.com hosted fields payment form in to my new site. (This module code is built in Drupal, not that should affect what I need to do.)

What I need to do is pull the relevant message from the response from pinpayments when a payment is sucessful or a payment is declined. At present the payment form I have does submit the payment as it shows up on my pinpayments dashboard - but I can't figure out how to display an error message when the card is declined.

This is the code I have at present that means I can post the form:

<?php



namespace Drupal\drupalup_simple_form\Form;

use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Ajax\AjaxResponse;
use Drupal\Core\Ajax\HtmlCommand;

/**
 * Our simple form class.
 */
class SimpleAjaxForm extends FormBase {



  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    return 'payment_form';
  }


  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state) {

    $form['#attributes'] = array('id' => array('payment_form'));


    $form['publishkey'] = [
      '#type' => 'textfield',
      '#title' => 'Key',
      '#id' => 'card_token',
      '#value' => 'pk_wkHM76EknXUavjrEYZlvNQ'
    ];

    $form['address_line1'] = [
      '#type' => 'textfield',
      '#title' => 'Address line 1',
      '#id' => 'address_line1'
    ];
      $form['address_line2'] = [
      '#type' => 'textfield',
      '#title' => 'Address line 2',
      '#id' => 'address_line2'
    ];
      $form['address_city'] = [
      '#type' => 'textfield',
      '#title' => 'City',
      '#id' => 'address_city'
    ];
      $form['address_postcode'] = [
      '#type' => 'textfield',
      '#title' => 'Postcode',
      '#id' => 'address_postcode'
    ];
      $form['address_state'] = [
      '#type' => 'textfield',
      '#title' => 'State',
      '#id' => 'address_state'
    ];
      $form['address_country'] = [
      '#type' => 'textfield',
      '#title' => 'Country',
      '#id' => 'address_country'
    ];



    $form['name'] = [
      '#type' => 'markup',
      '#markup' => '<div id="name"><!-- Hosted Fields will populate this with the "name" field --></div>',
    ];
    $form['errors_for_name'] = [
      '#type' => 'markup',
      '#markup' => '<div class="error_message" id="errors_for_name">&nbsp;</div>',
    ];


    $form['number'] = [
      '#type' => 'markup',
      '#markup' => '<div id="number"><!-- Hosted Fields will populate this with the "number" field --></div>',
    ];
    $form['errors_for_number'] = [
      '#type' => 'markup',
      '#markup' => '<div class="error_message" id="errors_for_number">&nbsp;</div>',
    ];


    $form['cvc'] = [
      '#type' => 'markup',
      '#markup' => '<div id="cvc"><!-- Hosted Fields will populate this with the "cvc" field --></div>',
    ];
    $form['errors_for_cvc'] = [
      '#type' => 'markup',
      '#markup' => '<div class="error_message" id="errors_for_cvc">&nbsp;</div',
    ];


    $form['expiry'] = [
      '#type' => 'markup',
      '#markup' => '<div id="expiry"><!-- Hosted Fields will populate this with the "expiry" field --></div>',
    ];  
    $form['errors_for_expiry'] = [
      '#type' => 'markup',
      '#markup' => '<div class="error_message" id="errors_for_expiry">&nbsp;</div>',
    ];  

    $form['actions'] = [
      '#type' => 'button',
      '#value' => 'Submit'
    ];

    return $form;
  }



  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
  }

}

$ch = curl_init();


curl_setopt($ch, CURLOPT_URL, 'https://test-api.pinpayments.com/1/charges');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, "amount=500&currency=AUD&description=test charge&email=roland@pinpayments.com&ip_address=203.192.1.172&card[number]=4100000000000001&card[expiry_month]=05&card[expiry_year]=2021&card[cvc]=123&card[name]=TIGER WOODS&card[address_line1]=$_POST[address_line1]&card[address_line2]=&card[address_city]=$_POST[address_city]&card[address_postcode]=$_POST[address_postcode]&card[address_state]= $_POST[address_state]&card[address_country]=$_POST[address_country]&metadata[OrderNumber]=123456&metadata[CustomerName]=Roland Robot");



curl_setopt($ch, CURLOPT_USERPWD, 'REMOVED MY SECRET KEY' . ':' . '');

$headers = array();
$headers[] = 'Content-Type: application/x-www-form-urlencoded';
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

$result = curl_exec($ch);
if (curl_errno($ch)) {
    echo 'Error:' . curl_error($ch);
}

curl_close($ch);

How do I do a 'GET' so that if the payment is declined I'm somehow able to show this to the user?

{
  "error": "card_declined",
  "error_description": "The card was declined",
  "charge_token": "ch_lfUYEBK14zotCTykezJkfg"
}

https://pinpayments.com/developers/api-reference/charges

Answer 1

$token = "xyz";

$error = array(
    "error" => "card_declined",
    "error_description" => "The card was declined",
    "charge_token"=> $token
    );

echo(json_encode($error,true));