# swoole_async_write

(PHP 5 >= 5.2.0, PHP 7, PECL swoole >= 1.9.0)

swoole_async_write — Write data to a file stream asynchronously

### 说明

swoole_async_write ( string `$filename` , string `$content` [, integer `$offset` [, callable `$callback` ]] ) : bool

### 参数

`filename`

  The filename being written.

`content`

  The content writing to the file.

`offset`

  The offset.

`callback`

### 返回值

成功时返回 `TRUE`， 或者在失败时返回 `FALSE`。