fixed

digital_doctor/application/api/controller/Reporttt.php

@@ -102,6 +102,9 @@ class Reporttt
         $chatobj->setBefore($content);
 
         $sub_content = json_decode($contentstr,true);
+        if(empty($sub_content)){
+            return json(Tools::set_fail('没有对话诊断信息'));
+        }
         Tools::log_to_write_txt(['聊天记录content：'=>$sub_content]);
         //$content = [
         //    //["role" => "user", "content" => '']