Cancels a request
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    eio_cancel

    (PECL eio >= 0.0.1dev)

    eio_cancel — Cancels a request

    Description

    eio_cancel(resource $req): void

    eio_cancel() cancels a request specified by req

    Parameters

    req

    The request resource

    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.

    Return Values

    No value is returned.

    Examples

    Example #1 eio_cancel() example

    <?php /* Is called when eio_nop() finished */ function my_nop_cb($data, $result) {  echo "my_nop ", $data, "\n"; }// This eio_nop() call will be cancelled$req = eio_nop(EIO_PRI_DEFAULT, "my_nop_cb", "1");var_dump($req);eio_cancel($req);// This time eio_nop() will be processedeio_nop(EIO_PRI_DEFAULT, "my_nop_cb", "2");// Process requestseio_event_loop();?>

    The above example will output something similar to:

    resource(4) of type (EIO Request Descriptor)
my_nop 2

    See Also