(PECL swoole >= 1.9.0)
swoole_async_read — Read file stream asynchronously
$filename
,$callback
,$chunk_size
= 65536,$offset
= 0
filename
The filename of the file being read.
callback
filename
The name of the file.
content
The content readed from the file stream.
chunk_size
The chunk length.
offset
The offset.
Whether the read is succeed.