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
Description
$fd
, int $offset
, int $whence
[, int $pri
= EIO_PRI_DEFAULT
[, callable $callback
= NULL
[, mixed $data
= NULL
]]] )
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 tooffset
bytes.EIO_SEEK_CUR
- Set position to current location plusoffset
.EIO_SEEK_END
- Set position to end-of-file plusoffset
.
Parameters
-
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
. IfNULL
passed,pri
internally is set toEIO_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
.
Return Values
eio_seek() returns request resource on success or FALSE
on error.
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