(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.
fdStream, Socket instance, or numeric file descriptor.
offsetStarting 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.priThe 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]);datais custom data passed to the request.
resultrequest-specific result value; basically, the value returned by corresponding system call.
reqis 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.