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