interface

@@ -228,7 +228,7 @@ class OrderController extends HomeBaseController{
         $body='支付';
         $price=$order['price'];//订单价格
         $notify_url=url('order/notify','','',true);//回调地址
-        $out_trade_no=$order_no.rand(1000,9999);
+        $out_trade_no=$order_no.$this->create_noncestr(4);
         $wxPay=new WeixinPay($openId,$out_trade_no,$body,$price,$notify_url);
         $pay=$wxPay->pay();
         if (isset($pay['package'])){
@@ -277,4 +277,13 @@ class OrderController extends HomeBaseController{
         }
     }
 
+    function create_noncestr($length = 4){
+        $chars = "0123456789";
+        $str = "";
+        for($i=0;$i<$length;$i++){
+            $str.= substr($chars,mt_rand(0,strlen($chars)-1),1);
+        }
+        return $str;
+    }
+
 }
\ No newline at end of file