Paypal PHP Rest API用于信用卡付款，如何处理错误以显示给用户

Question

I am using Paypal PHP Rest API from here for credit card payment. I can pay successfully with demo data. In real time when a user faces error in credit card payment, I need a way to show it in a user-friendly way rather than in a programmatic way.

From the paypal developer site , I found the format of the error object returned but cannot figure out how to use that.

My code follows:

try {
    $payment->create($apiContext);


} catch (PayPal\Exception\PPConnectionException $ex) {

echo "Exception: " . $ex->getMessage() . PHP_EOL;
    var_dump($ex->getData());

}

With intentional input of wrong data, following error message was there:

        Exception: Got Http response code 400 when accessing 
    https://api.sandbox.paypal.com/v1/payments/payment.

        string '{"name":"VALIDATION_ERROR","details":

    [{"field":"payer.funding_instruments[0].credit_card",
    "issue":"Invalid expiration (cannot be in the past)"},

    {"field":"payer.funding_instruments[0].credit_card.number",
    "issue":"Value is invalid"},{"field":
    "payer.funding_instruments[0].credit_card.cvv2",
    "issue":"Length is invalid (must be 3 or 4, 
    depending on card type)"}],"message":"Invalid request 
    - see details","information_link":
    "https://developer.paypal.com/webapps
/developer/docs/api/#VALIDATION_ERROR","debug_id":
"bdcc'... (length=523)

So how can I get the error object as said in the mentioned Paypal developer site and how to use that to show errors to a non-techie person?

Answer 1

The error returned is in JSON format. You can use json_decode to decode it in PHP:

$error_object = json_decode($ex->getData());
switch ($error_object->name)
{
    case 'VALIDATION_ERROR':
        echo "Payment failed due to invalid Credit Card details:\n";
        foreach ($error_object->details as $e)
        {
            echo "\t" . $e->field . "\n\t" . $e->issue . "\n\n";
        }
        break;
}

Add whichever cases you would like to your switch. And you can add your own flair, parse the $e->field and $e->issue to display whatever you like, etc.