新增订单生成函数

app/common.php

@@ -36,7 +36,6 @@ function json_message($data = [], $code = 0, $msg = '')
       $msg = $data;
       $data = [];
     }
-
   } else if ($data instanceof Url) {
     $data = [
       'jump_to_url' => (string)$data
@@ -258,3 +257,9 @@ function check_permission($key,$admin_id = null)
 
   return false;
 }
+
+
+function get_order_sn($start = '', $end = '')
+{
+  return $start . date('YmdHis') . mt_rand(1000, 9999) . $end;
+}