edit

app/user/lib/Seat.php

@@ -127,8 +127,17 @@ class Seat
             Dever::alert('错误的用户信息');
         }
 
+        $info = Dever::db('collection/info')->one($info_id);
+        if (!$info) {
+        	Dever::alert('购买失败');
+        }
+        $cate = Dever::db('collection/cate')->one($info['cate_id']);
+        if (!$cate) {
+            Dever::alert('购买失败');
+        }
+
         $tmp = explode(',', $seat);
-        $num = count($num);
+        $num = count($tmp);
 
         $where['info_id'] = $info_id;
 		$where['content_id'] = $content_id;