swoole_event_isset

• $fd：任意的socket文件描述符，参考 swoole_event_add 文档

swoole_event_add($fd, $callback, null, SWOOLE_EVENT_READ);
var_dump(swoole_event_isset($fd, SWOOLE_EVENT_READ)); //返回 true
var_dump(swoole_event_isset($fd, SWOOLE_EVENT_READ | SWOOLE_EVENT_WRITE)); //返回 true