修改判空。直接判断整个json应对php warining 错误

application/third_party/train/controllers/search.php

@@ -32,22 +32,25 @@ class search extends CI_Controller{
 			}
 			
 			$firstdata = $back_data;
-			$reason = json_decode($back_data)->reason;
 			$return_data = new stdClass();
 			$cache = 'no';
-			if(empty(json_decode($back_data)->result)){
+			
+			if(empty($back_data)){
 				$obj = $this->BIZ_train_model->get_train_info($fromStation,$toStation);
 			if($obj){
 				$back_data = $obj->tpc_content;
 				$cache = 'yes';
 				$this->cache = true;
+				$reason = '接口数据为空，调用缓存';
 				log_message('error','查询为空的链接:'.$url.'|出错的原因:'.$firstdata.'|调用缓存号：'.$obj->tpc_sn.'|缓存生成的时间:'.$obj->tpc_datetime);
 				}else{
 					log_message('error','查询为空的链接:'.$url.'|出错的原因:'.$firstdata.'|缓存为空');
 				}	
 			}else{
+				$reason = json_decode($back_data)->reason;
 				$this->BIZ_train_model->addOrUpdate($fromStation,$toStation,$back_data);
 			}
+			
 			$return_data->httpstatus = 200;
 			$return_data->reason = $reason;
 			$return_data->cache = $cache;