swoole_async_writefile

(PECL swoole >= 1.9.0)

swoole_async_writefile — Write data to a file asynchronously

swoole_async_writefile(
    string$filename,
    string$content,
    callable$callback = ?,
    int$flags = 0
): bool

成功时返回 true，或者在失败时返回 false。