用cookie显示浏览历史时，unserialize出错解决思路

';
echo '
下一页';

    

if(isset($_COOKIE['his'])) {
    //echo $_COOKIE['his'];exit;
    $data = unserialize($_COOKIE['his']);
    $url = $_SERVER['REQUEST_URI'];
    $data[] = $url;
    $data = array_unique($data);
    
   
    if(count($data) >10) {
        array_shift($data);
    }
    
    $urls = serialize($data);
    setcookie('his',$urls,time()*2*24*3600);

} else {
    $url = $_SERVER['REQUEST_URI'];
    $data[] = $url;
    $urls = serialize($data);
    setcookie('his',$urls,time()*2*24*3600);
}


?>






    
浏览历史
    
    
">
    

Notice: unserialize() [function.unserialize]: Error at offset 9 of 41 bytes in D:\server\apache\www\20120413\history.php on line 16