eio_sendfile
(PECL eio >= 0.0.1dev)
eio_sendfile — Transfer data between file descriptors
说明
mixed
$out_fd
,mixed
$in_fd
,int
$offset
,int
$length
,int
$pri
= ?,callable
$callback
= ?,string
$data
= ?): resource
eio_sendfile() copies data between one file descriptor
and another. See SENDFILE(2)
man page for details.
参数
out_fd
-
Output stream, Socket resource, or file descriptor. Should be opened for writing.
in_fd
-
Input stream, Socket resource, or file descriptor. Should be opened for reading.
offset
-
Offset within the source file.
length
-
Number of bytes to copy.
pri
-
请求的优先级:
EIO_PRI_DEFAULT
,EIO_PRI_MIN
,EIO_PRI_MAX
或null
。如果是null
,pri
将设为EIO_PRI_DEFAULT
。 callback
-
callback
函数在请求完成时被调用。其应匹配一下原型:void callback(mixed $data, int $result[, resource $req]);
data
传递给请求的用户数据。
result
针对请求的结果的值。通常是相应的系统调用返回的值。
req
可选的请求资源,可被 eio_get_last_error() 之类的函数使用。
data
-
Arbitrary variable passed to
callback
.
返回值
eio_sendfile() returns request resource on success, 或者在失败时返回 false
.
用户贡献的备注
备份地址:http://www.lvesu.com/blog/php/function.eio-sendfile.php