exception 'PayPal\Exception\PayPalConnectionException' with message 'Got Http response code 400 when accessing

Seeing an error message similar to this ?

exception 'PayPal\Exception\PayPalConnectionException' with message 'Got Http response code 400 when accessing https://api.sandbox.paypal.com/v1/payments/payment.' in /Users/japatel/Documents/workspace/paypal/PayPal-PHP-SDK/lib/PayPal/Core/PayPalHttpConnection.php:178 
Stack trace: 
#0 /Users/japatel/Documents/workspace/paypal/PayPal-PHP-SDK/lib/PayPal/Transport/PayPalRestCall.php(74): PayPal\Core\PayPalHttpConnection->execute('{"intent":"sale...') 
#1 /Users/japatel/Documents/workspace/paypal/PayPal-PHP-SDK/lib/PayPal/Common/PayPalResourceModel.php(103): PayPal\Transport\PayPalRestCall->execute(Array, '/v1/payments/pa...', 'POST', '{"intent":"sale...', NULL) 
#2 /Users/japatel/Documents/workspace/paypal/PayPal-PHP-SDK/lib/PayPal/Api/Payment.php(424): PayPal\Common\PayPalResourceModel::executeCall('/v1/payments/pa...', 'POST', '{"intent":"sale...', NULL, Object(PayPal\Rest\ApiContext), NULL) 
#3 /Users/japatel/Documents/workspace/paypal/PayPal-PHP-SDK/sample/payments/CreatePaymentUsingPayPal.php(101): PayPal\Api\Payment->create(Object(PayPal\Rest\ApiContext)) 
#4 {main}

Understand your errors

PayPal returns detailed data on every exception (except 500 INTERNAL_SERVER_ERROR), explaining what was the exact error you are seeing. You can retrieve that as follows:

• Update your exception handling to catch PayPalConnectionException and print $ex->getData() as shown below:

try {
    $payment->create($apiContext);
} catch (PayPal\Exception\PayPalConnectionException $ex) {
    echo $ex->getCode(); // Prints the Error Code
    echo $ex->getData(); // Prints the detailed error message 
    die($ex);
} catch (Exception $ex) {
    die($ex);
}

Now, if you try again, you will see something like this:

{
    "name": "VALIDATION_ERROR",
    "details": [
        {
            "field": "transactions[0].amount",
            "issue": "Transaction amount details (subtotal, tax, shipping) must add up to specified amount total"
        }
    ],
    "message": "Invalid request - see details",
    "information_link": "https://developer.paypal.com/webapps/developer/docs/api/#VALIDATION_ERROR",
    "debug_id": "0faff23b719d8"
}
exception 'PayPal\Exception\PayPalConnectionException' with message 'Got Http response code 400 when accessing https://api.sandbox.paypal.com/v1/payments/payment.' in /Users/japatel/Documents/workspace/paypal/PayPal-PHP-SDK/lib/PayPal/Core/PayPalHttpConnection.php:178 
Stack trace: 
#0 /Users/japatel/Documents/workspace/paypal/PayPal-PHP-SDK/lib/PayPal/Transport/PayPalRestCall.php(74): PayPal\Core\PayPalHttpConnection->execute('{"intent":"sale...') 
#1 /Users/japatel/Documents/workspace/paypal/PayPal-PHP-SDK/lib/PayPal/Common/PayPalResourceModel.php(103): PayPal\Transport\PayPalRestCall->execute(Array, '/v1/payments/pa...', 'POST', '{"intent":"sale...', NULL) 
#2 /Users/japatel/Documents/workspace/paypal/PayPal-PHP-SDK/lib/PayPal/Api/Payment.php(424): PayPal\Common\PayPalResourceModel::executeCall('/v1/payments/pa...', 'POST', '{"intent":"sale...', NULL, Object(PayPal\Rest\ApiContext), NULL) 
#3 /Users/japatel/Documents/workspace/paypal/PayPal-PHP-SDK/sample/payments/CreatePaymentUsingPayPal.php(101): PayPal\Api\Payment->create(Object(PayPal\Rest\ApiContext)) 
#4 {main}

The details provided in the exception will help you figure out what the error is. Enjoy Coding ...