# swoole_async_read

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

swoole_async_read — Read file stream asynchronously

### 说明

swoole_async_read ( string `$filename` , callable `$callback` [, int `$chunk_size` = 65536 [, int `$offset` = 0 ]] ) : bool

### 参数

`filename`

  The filename of the file being read.

`callback`
  callback ( string `$filename` , string `$content` ) : mixed
  `filename`

    The name of the file.

  `content`

    The content readed from the file stream.

`chunk_size`

  The chunk length.

`offset`

  The offset.

### 返回值

Whether the read is succeed.