eio_seek
(PECL eio >= 0.5.0b)
eio_seek — Repositions the offset of the open file associated with the fd argument to the argument offset according to the directive whence
Beschreibung
mixed
$fd,int
$offset,int
$whence,int
$pri = EIO_PRI_DEFAULT,callable
$callback = NULL,mixed
$data = NULL): resource
eio_seek() repositions the offset of the open file associated with
stream, Socket resource, or file descriptor specified by fd to the argument offset according to the directive whence as follows:
EIO_SEEK_SET- Set position equal tooffsetbytes.EIO_SEEK_CUR- Set position to current location plusoffset.EIO_SEEK_END- Set position to end-of-file plusoffset.
Parameter-Liste
-
fd -
Stream, Socket resource, or numeric file descriptor
-
offset -
Starting point from which data is to be read.
-
length -
Number of bytes to be read.
-
pri -
The request priority:
EIO_PRI_DEFAULT,EIO_PRI_MIN,EIO_PRI_MAX, ornull. Ifnullpassed,priinternally is set toEIO_PRI_DEFAULT. -
callback -
callbackfunction is called when the request is done. It should match the following prototype:void callback(mixed $data, int $result[, resource $req]);-
data -
is custom data passed to the request.
-
result -
request-specific result value; basically, the value returned by corresponding system call.
-
req -
is optional request resource which can be used with functions like eio_get_last_error()
-
-
data -
Arbitrary variable passed to
callback.
Rückgabewerte
eio_seek() returns request resource on success,Bei einem Fehler wird false zurückgegeben..
