PHP |贝宝休息 API | java.lang.NullPointerException答案

【问题标题】：PHP | Paypal Rest API | java.lang.NullPointerExceptionPHP |贝宝休息 API | java.lang.NullPointerException
【发布时间】：2017-02-01 00:50:48
【问题描述】：

我正在使用 Express Checkout REST API 在 Paypal 上付款。我在 PHP 中使用 CURL 成功检索了我的令牌。但是，实际付款的下一部分不起作用。

我收到以下错误：

java.lang.NullPointerException（我相信这个错误来自 paypal？）

我尝试过查看代码，但我不明白我做错了什么，因为它都是简单的结构。

我的代码：

$payment_result_json = array(
                       "intent" => "sale", 
                       "redirect_urls" => array("return_url" => "http://paypal/paypal_return.php", "cancel_url" => "http://paypal/paypal_cancel.php"),
                       "payer" => array("payment_method" => "paypal"),
                       "transactions" => array(

                            "amount" => array("amount" => array(
                                "total" => "1", "currency" => "USD", "details" => array(
                                    "subtotal" => "1", "shipping" => "0", "tax" => "1", "shipping_discount" => "0"
                                    )
                            )),

                            "item_list" => array("quantity" => "1", "name" => "Item 1", "price" => "1", "currency" => "USD", "description" => "item1 desc","tax" => "1"),
                            "description" => "Tutoring lesson"
                       ));

$post_headers = array("Authorization: Bearer $retreived_access_token");

$ch = curl_init("https://api.sandbox.paypal.com/v1/payments/payment");

curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, $post_headers);

while(empty($payment_result)){
    $payment_result = curl_exec($ch);
}

if(empty($payment_result)){
    print curl_error($ch);
}else{
    print $payment_result;
}

curl_close($ch);

$payment_result_json = json_decode($payment_result);

print_r($payment_result_json);

【问题讨论】：

标签： php curl paypal paypal-rest-sdk

【解决方案1】：

我昨天遇到了同样的问题。我解决了它添加这个标题： $post_headers = array("Authorization: Bearer $retreived_access_token", "Content-Type: application/json");

希望对你有帮助

【讨论】：