统计学时问题修复

@@ -2092,7 +2092,7 @@ function id_xueshi($id){
         ->field(' SUM(yuyue_end - yuyue_begin) as yyxs ')
         ->select()->toArray();
 //    return Db::name('yuyue')->getLastSql();
-    return json($name) ;
+    return json_encode($name,true) ;
     $yyxs = $name ? $name['yyxs'] : 0;
     return $yyxs;
 }