(PHP 5 >= 5.2.0, PHP 7, PECL swoole >= 1.9.0)
swoole_async_write — Write data to a file stream asynchronously
$filename
, string $content
[, integer $offset
[, callable $callback
]] ) : bool
filenameThe filename being written.
contentThe content writing to the file.
offsetThe offset.
callback
成功时返回 TRUE， 或者在失败时返回 FALSE。