(PECL eio >= 0.5.0b)
eio_seek — Seek to a position
$fd
,$offset
,$whence
,$pri
= EIO_PRI_DEFAULT,$callback
= NULL,$data
= NULL
eio_seek() repositions the offset of the open file associated with
stream, Socket instance, or file descriptor specified by fd
to
the argument offset
according to
the directive whence
.
fd
Stream, Socket instance, or numeric file descriptor.
offset
Starting point from which data is to be read.
whence
whence
values are:
EIO_SEEK_SET
- Set position equal to offset
bytes.EIO_SEEK_CUR
- Set position to current location plus offset
.EIO_SEEK_END
- Set position to end-of-file plus offset
.pri
The request priority: EIO_PRI_DEFAULT
, EIO_PRI_MIN
, EIO_PRI_MAX
, or null
.
If null
passed, pri
internally is set to
EIO_PRI_DEFAULT
.
callback
callback
function 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
.
eio_seek() returns request resource on success, or false
on failure.