$apiEndpoint = $_POST['apiEndpoint']; $channelId = $_POST['channelId']; $channelSecret = $_POST['channelSecret']; $params = ["orderId" => isset($_POST['orderId']) ? $_POST['orderId'] : null, "transactionId" => isset($_POST['transactionId']) ? $_POST['transactionId'] : null]; try { $LinePay = new Chinwei6\LinePay($apiEndpoint, $channelId, $channelSecret); $result = $LinePay->checkPayment($params); echo json_encode($result, JSON_PRETTY_PRINT); } catch (Exception $e) { echo $e->getMessage(); } } else { if (isset($_POST['refundSubmit'])) { if (empty($_POST['transactionId'])) { echo "transactionId is required."; return; } $apiEndpoint = $_POST['apiEndpoint']; $channelId = $_POST['channelId']; $channelSecret = $_POST['channelSecret']; $transactionId = isset($_POST['transactionId']) ? $_POST['transactionId'] : null; $params = ["refundAmount" => isset($_POST['refundAmount']) ? $_POST['refundAmount'] : null]; try { $LinePay = new Chinwei6\LinePay($apiEndpoint, $channelId, $channelSecret); $result = $LinePay->refund($transactionId, $params); echo json_encode($result, JSON_PRETTY_PRINT); } catch (Exception $e) { echo $e->getMessage(); } } }