apc_fectch()获取不到值解决办法

$status=apc_fecth('upload_'.$_GET['key']);

if(isset($_GET['key']))
{
    echo json_encode(getStatusAPC());
}
function getStatusAPC()
{
    $response=false;
    if($status = apc_fetch('upload_'.$_GET['key'])) {
        $response=apc_fetch('upload_'.$_GET['key']);
    }
    return $response;
}
if ($_SERVER['REQUEST_METHOD'] == 'POST'){
    $myfile=$_FILES['upfile'];
    echo $myfile['size'];
    echo $myfile['size'];
    print_r($myfile);
    $tempf=$myfile['tmp_name'];
    $name=$myfile['name'];
    move_uploaded_file($tempf,'up/'.$name);
}