(PECL swoole >= 1.9.0)
swoole_async_write — Write data to a file stream asynchronously
$filename
, string $content
, int $offset
= ?
, callable $callback
= ?
) : bool
filename
The filename being written.
content
The content writing to the file.
offset
The offset.
callback
成功时返回 true
, 或者在失败时返回 false
。