优化查询过程避免出现php错误

application/third_party/ctrip/controllers/ctrip_train.php

@@ -43,7 +43,8 @@ class ctrip_train extends CI_Controller{
 		$TrainNo = $this->input->get_post('TrainNo');
 		
 		if(!$date || !$from || !$to){
-			exit('传参错误！');
+			header("HTTP/1.1 404 Not Found");  
+			exit('{"httpstatus":404,"data":{"seven":false,"cache":false,"result":[],"map":{}}}');
 		}else{
 			$isCache = false;
 			$iseven = false;
@@ -55,10 +56,19 @@ class ctrip_train extends CI_Controller{
 				$iseven = true;
 			}
 			
-			//转换三字码为中文
+			//转换三字码为中文 
-			$from = $this->ctrip_model->ReplaceCodeToName($from)->station_name;
+			$FromCode = $this->ctrip_model->ReplaceCodeToName($from);
-			$to = $this->ctrip_model->ReplaceCodeToName($to)->station_name;
+			$ToCode = $this->ctrip_model->ReplaceCodeToName($to);
-
+			
+			
+			if(!$FromCode || !$ToCode){
+				header("HTTP/1.1 404 Not Found");  
+				exit('{"httpstatus":404,"data":{"seven":false,"cache":false,"result":[],"map":{}}}');
+			}else{
+				$from = $FromCode->station_name;
+				$to = $ToCode->station_name;
+			}
+			
 			//生成请求链接
 			$TimeStamp = time();
 			$Sign = md5($TimeStamp.DATAKEY);
@@ -74,8 +84,14 @@ class ctrip_train extends CI_Controller{
 			
 			$ResponseData = json_decode($ResponseJson);
 			$api_responsive_time = $api_end_time - $api_start_time;
+			//print_r($ResponseData);die();
+			
+			if(empty($ResponseData->Trains)){
+				log_message('error','ctrip_trian|status:trains is empty |相应时间:'.$api_responsive_time);
+			}else{
+				log_message('error','ctrip_trian|status:'.$ResponseData->ResponseStatus->Ack.'|相应时间:'.$api_responsive_time);
+			}
 			
-			log_message('error','ctrip_trian|status:'.$ResponseData->ResponseStatus->Ack.'|相应时间:'.$api_responsive_time);
 			
 			//定义返回的json
 			$ReturnData = new stdClass();