# swoole_client->errCode
类型为int型。当connect/send/recv/close失败时，会自动设置$swoole_client->errCode的值。
errCode的值等于Linux errno。可使用socket_strerror将错误码转为错误信息。
~~~
echo socket_strerror($client->errCode);
~~~
> [附录：Linux的errno定义](#)
| Swoole流程 |
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