如何閱讀multiliple會員餅乾在PHP

Question

你好，

如何設置像「LAST_VISIT」餅乾，如果用戶對我的網站 我嘗試了一些方法，但我失敗了多個帳戶。

that`s代碼，當用戶註銷

setcookie('last_visit',time(),time()+60*60*24*30*12); 

但是當用戶用另一個賬戶重新登錄頁面讀他的第一個客戶的最後一次訪問，此代碼

$lastvisit = $_COOKIE['last_visit']; 

能我鏈接上次訪問Cookie與用戶ID cookie在一個cookie

請幫我用正確的方法

Answer 1

嘗試刪除現有的或舊的cookies時，寫入新的。做一個互斥的登錄，當用戶登錄到一個賬戶時，他們將從其他賬戶註銷。

Answer 2

兩種選擇：一種是創建一個用戶ID和上次訪問的關聯數組，並存儲序列化爲cookie的內容。第二種選擇是爲每個用戶創建一個名爲「last_visit_ [user_id]」的cookie。首先可能更友好添加它需要更少的用戶cookie。

---

編輯 - 這是一個UNTESTED示例。對不起，任何錯誤，但這應該給你的主旨。

關鍵數據存儲在$ aLastLogged [UserID] = TimeLastLogged的關聯數組中;

// This will be the user id of hte current user as set somewhere else. 
$userID = 123; 


// This will store the time the user last logged on. 0 = not logged on 
$LastLoggedOn = 0; 

// Read the cookie - allow for errors! 
$aLastLogged = false; // Start with "false" and we'll correct later if is works 
// Check if cookie exists 
if (isset($_COOKIE['last_logged'])) { 
    // Read the cookie contents. The @ hides the errors in case the cookie is corrupted 
    $aLastLogged = @unserialize($_COOKIE['last_logged']); 
} 

// At this point, aLastLogged will be an array, or false if it was not set or failed 

if ($aLastLogged) { 
    // See if this user has been here before by checking if there is an element in the array 
    if (isset($aLastLogged[$userID])) { 
     $LastLoggedOn = (int)$aLastLogged[$userID]; 
     // Note - I cast as "int" to check it's a valid number. You could alos check hte range is valid - just in case someone's been fiddlign with the cookie. Trust no input, ever, including cookies 
    } 
} else { 
    // Create a blank array for the cookie 
    $aLastLogged = array(); 
} 


// At this point, you have the time in $LastLoggedOn 

// Now update the cookie by creating/updating hte associative element 
$aLastLogged[$user_ID] = time(); 
// Set the cookie; set the time and path and domain as required - the following is for 1 day - you'll want longer. 
setcookie('last_logged', serialize($aLastLogged), time() + 86400, '/');