/**
      +----------------------------------------------------------
     * 浏览记录按照时间排序
      +----------------------------------------------------------
     */
    function my_sort($a, $b){
        $a = substr($a,1);
        $b = substr($b,1);
        if ($a == $b) return 0;
        return ($a > $b) ? -1 : 1;
      }
    /**
      +----------------------------------------------------------
     * 网页浏览记录生成
      +----------------------------------------------------------
     */
    function cookie_history($id,$title,$price,$img,$url){
        $dealinfo['title'] = $title;
        $dealinfo['price'] = $price;
        $dealinfo['img'] = $img;
        $dealinfo['url'] = $url;
        $time = 't'.NOW_TIME;
        $cookie_history = array($time => json_encode($dealinfo));  //设置cookie
        if (!cookie('history')){//cookie空，初始一个
            cookie('history',$cookie_history);
            }else{
            $new_history = array_merge(cookie('history'),$cookie_history);//添加新浏览数据
            uksort($new_history, "my_sort");//按照浏览时间排序
            $history = array_unique($new_history);
            if (count($history) > 4){
                $history = array_slice($history,0,4);
            }
            cookie('history',$history);
        }
    }
    /**
      +----------------------------------------------------------
     * 网页浏览记录读取
      +----------------------------------------------------------
     */
    function cookie_history_read(){
            $arr = cookie('history');
            foreach ((array)$arr as $k => $v){
                $list[$k] = json_decode($v,true);
            }
            return $list;
    }