eio_sendfile
(PECL eio >= 0.0.1dev)
eio_sendfile — Transfer data between file descriptors
說明
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.
參數
-
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 -
請求的優先順序：
EIO_PRI_DEFAULT，EIO_PRI_MIN，EIO_PRI_MAX或null。如果是null，pri將設為EIO_PRI_DEFAULT。 -
callback -
callback函式在請求完成時被呼叫。其應匹配一下原型：void callback(mixed $data, int $result[, resource $req]);-
data -
傳遞給請求的用戶數據。
-
result -
針對請求的結果的值。通常是相應的系統呼叫返回的值。
-
req -
可選的請求資源，可被 eio_get_last_error() 之類的函式使用。
-
-
data -
Arbitrary variable passed to
callback.
返回值
eio_sendfile() returns request resource on success, 或者在失敗時返回 false.