eio_sync (PECL eio >= 0.0.1dev)eio_sync — Commit buffer cache to disk 说明 eio_sync(int $pri = EIO_PRI_DEFAULT, callable $callback = NULL, mixed $data = NULL): resource 参数 此函数没有参数。 返回值 eio_sync() returns request resource on success, 或者在失败时返回 false.