技術文庫項目的最新瀏覽記錄和記住登陸狀態的COOKIE加密存儲

今天在工做中,遇到了這樣一個問題。關於COOKIE的加密儲存;下面介紹下,如何實現最新瀏覽記錄:用戶的最新瀏覽記錄分爲：用戶登陸和用戶未登陸的狀況；用戶登陸後,除了寫COOKIE，還要存儲在數據表當中,爲了保證用戶在其餘的電腦上登陸,仍然可以查看以前的瀏覽記錄。代碼以下:

static public function setUserNewBroswer($id,$data){
		$tempNumber = 10;
		$data = $id."|".safe_replace($data);
                $user_info = $_SESSION['login_user'];
                $user_arr  = explode("|", $user_info);
                $user_id   = $user_arr[1];
                $user_name = $user_arr[0];
                $cookie_name = "wk_search".(empty($user_id)?"":base64_encode($user_id."+".$user_name."+"));
		$user_search_record = isset($_COOKIE[$cookie_name]) ? explode(",",trim(base64_decode(trim($_COOKIE[$cookie_name],",")))) : array();
                if(count($user_search_record) >= $tempNumber){
			array_shift($user_search_record);
                        if(!in_array(trim($data),$user_search_record)){
                             $user_search_record[] = $data;
                        }
		}else{
                          if(!in_array(trim($data), $user_search_record)){
                                $user_search_record[] = $data;
                          }
		}
              $cookie_value = base64_encode(implode(",",$user_search_record));
		setcookie($cookie_name,$cookie_value,time()+3600*24*30,"/");
		if(!empty($user_info)){
			$user_arr = explode("|", $user_info);
			$user_id  = $user_arr[1];
			$search_cookie = serialize($user_search_record);
			$dblink = new DataBase("");
			$exist = Wk::isExistUserSearch($user_id);
			if($exist){
				$dblink->query("UPDATE wk_search SET user_search='$search_cookie' WHERE user_id='$user_id'");
			}else{
				$dblink->query("INSERT INTO wk_search(user_id,user_search) VALUES('$user_id','$search_cookie')");
			}
		}
	}

那麼獲取COOKIE的代碼以下:

static public function getUserNewBrowser(){
		$user_info = $_SESSION['login_user'];
		$user_arr  = explode("|", $user_info);
		$user_id   = $user_arr[1];
              $user_name = $user_arr[0];
		$dblink = new DataBase("");
		if($user_info){
			$rs = $dblink->getRow("SELECT user_search FROM wk_search WHERE user_id='$user_id'");
                        if(!empty($rs)){
                                return unserialize($rs[0]['user_search']);
			}else{
				return array();
			}
		}else{
                     $cookie_name = "wk_search".(empty($user_id)?"":base64_encode($user_id."+".$user_name."+"));
			$cookie = base64_decode(trim($_COOKIE[$cookie_name],","));
			return $cookie ? explode(",", $cookie) : array();
		}
	}

須要注意的地方:

      <1>序列化存儲的時候,用於須要保存最新的10條數據記錄,則須要數據表的對應的字段的長度足夠大，不然，會出現serialize序列化後的字符串不完整的狀況。

     <2>在字符串入列的時候,注意清除字符串左右兩邊的空格。

    <3>在使用base64_encode()進行加密的時候,在獲取cookie的時候,須要清除字符串左右兩邊的空格。

    <4>對於頁面顯示的倒序,在調用的模板頁面,利用array_reverse就能夠。