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5.2.3 - swoole_event_isset.md

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swoole_event_isset

检测传入的$fd是否已加入了事件监听。

bool swoole_event_isset(mixed $fd, int $events = SWOOLE_EVENT_READ | SWOOLE_EVENT_WRITE);
  • $fd：任意的socket文件描述符，参考 swoole_event_add 文档
  • $events：检测的事件类型
  • SWOOLE_EVENT_READ：是否监听了可读事件
  • SWOOLE_EVENT_WRITE：是否监听了可写事件
  • SWOOLE_EVENT_READ | SWOOLE_EVENT_WRITE：监听可读或可写事件

需要2.1.2/1.10.3或更高版本

使用实例

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($fd, SWOOLE_EVENT_WRITE)); //返回 false
var_dump(swoole_event_isset($fd, SWOOLE_EVENT_READ | SWOOLE_EVENT_WRITE)); //返回 true