feat:健壮websocket

@@ -81,7 +81,7 @@ class Websocket
             if ($ret) {
                 output($this->desc, "连接成功");
                 $this->client=&$client;
-                swoole_timer_after(50, function () use ($onOpen) {
+                swoole_timer_after(50, function () use ($onOpen,$client) {
                     if ($onOpen) {
                         call_user_func($onOpen, $client);
                     }