我正在使用PHP SDK实现Paypal的订阅。两天前，一切运行正常。但是今天，我正在为我的站点创建一个新的计费计划，它给了我错误，这很奇怪。
PayPal\Exception\PayPalConnectionException Object
(
[url:PayPal\Exception\PayPalConnectionException:private] => https://api.sandbox.paypal.com/v1/payments/billing-plans/
[data:PayPal\Exception\PayPalConnectionException:private] => {"name":"VALIDATION_ERROR","details":[{"field":"merchant_preferences.cancel_url","issue":"Missing/Invalid URL entered.Max length is 2048"}],"message":"Invalid request. See details.","information_link":"https://developer.paypal.com/docs/api/payments.billing-plans#errors","debug_id":"74013e96ce3e"}
[message:protected] => Got Http response code 400 when accessing https://api.sandbox.paypal.com/v1/payments/billing-plans/.
[string:Exception:private] =>
[code:protected] => 400
[file:protected] => E:\xampp\htdocs\www\paypalDemo\PayPal-PHP-SDK\paypal\rest-api-sdk-php\lib\PayPal\Core\PayPalHttpConnection.php
[line:protected] => 202
[trace:Exception:private] => Array
(
[0] => Array
(
[file] => E:\xampp\htdocs\www\paypalDemo\PayPal-PHP-SDK\paypal\rest-api-sdk-php\lib\PayPal\Transport\PayPalRestCall.php
[line] => 78
[function] => execute
[class] => PayPal\Core\PayPalHttpConnection
[type] => ->
[args] => Array
(
[0] => {"name":"Monthly Basic Plan","description":"Basic Plan.","type":"fixed","payment_definitions":[{"name":"Regular Payments","type":"REGULAR","frequency":"Year","frequency_interval":"1","cycles":"90","amount":{"value":"297","currency":"USD"}}],"merchant_preferences":{"return_url":"http://localhost/www/paypalDemo/ExecuteAgreement.php?success=false","auto_bill_amount":"yes","initial_fail_amount_action":"CONTINUE","max_fail_attempts":"0"}}
)
)
[1] => Array
(
[file] => E:\xampp\htdocs\www\paypalDemo\PayPal-PHP-SDK\paypal\rest-api-sdk-php\lib\PayPal\Common\PayPalResourceModel.php
[line] => 104
[function] => execute
[class] => PayPal\Transport\PayPalRestCall
[type] => ->
[args] => Array
(
[0] => Array
(
[0] => PayPal\Handler\RestHandler
)
[1] => /v1/payments/billing-plans/
[2] => POST
[3] => {"name":"Monthly Basic Plan","description":"Basic Plan.","type":"fixed","payment_definitions":[{"name":"Regular Payments","type":"REGULAR","frequency":"Year","frequency_interval":"1","cycles":"90","amount":{"value":"297","currency":"USD"}}],"merchant_preferences":{"return_url":"http://localhost/www/paypalDemo/ExecuteAgreement.php?success=false","auto_bill_amount":"yes","initial_fail_amount_action":"CONTINUE","max_fail_attempts":"0"}}
[4] =>
)
)
[2] => Array
(
[file] => E:\xampp\htdocs\www\paypalDemo\PayPal-PHP-SDK\paypal\rest-api-sdk-php\lib\PayPal\Api\Plan.php
[line] => 363
[function] => executeCall
[class] => PayPal\Common\PayPalResourceModel
[type] => ::
[args] => Array
(
[0] => /v1/payments/billing-plans/
[1] => POST
[2] => {"name":"Monthly Basic Plan","description":"Basic Plan.","type":"fixed","payment_definitions":[{"name":"Regular Payments","type":"REGULAR","frequency":"Year","frequency_interval":"1","cycles":"90","amount":{"value":"297","currency":"USD"}}],"merchant_preferences":{"return_url":"http://localhost/www/paypalDemo/ExecuteAgreement.php?success=false","auto_bill_amount":"yes","initial_fail_amount_action":"CONTINUE","max_fail_attempts":"0"}}
)
这是我用来创建结算计划的代码。
$merchantPreferences = new MerchantPreferences();
$merchantPreferences->setReturnUrl("http://localhost/www/paypalDemo/ExecuteAgreement.php?success=true")
->setCancelUrl("http://localhost/www/paypalDemo/ExecuteAgreement.php?success=false")
->setAutoBillAmount("yes")
->setInitialFailAmountAction("CONTINUE")
->setMaxFailAttempts("0");
我的代码没有任何变化，它一直在起作用，但是今天它给了我这个例外。