Evercookie使用問題

Question

我發現很難得到由evercookie設置的cookie的價值。

我想要做的只是檢查是否設置了名稱evercookie或未設置。如果它沒有設置，那麼我想將它設置爲一個數字。

類似如下： var cookie_value = get_cookie_value; if（cookie_value == notdefined） set coookie to「12345」 else 想在php代碼中使用它。

Eveercoohie使用代碼如下從http://samy.pl/evercookie/

var ec = new evercookie(); 

// set a cookie "id" to "12345" 
// usage: ec.set(key, value) 
ec.set("id", "12345"); 

// retrieve a cookie called "id" (simply) 
ec.get("id", function(value) { alert("Cookie value is " + value) }); 

// or use a more advanced callback function for getting our cookie 
// the cookie value is the first param 
// an object containing the different storage methods 
// and returned cookie values is the second parameter 
function getCookie(best_candidate, all_candidates) 
{ 
    alert("The retrieved cookie is: " + best_candidate + "\n" + 
     "You can see what each storage mechanism returned " + 
     "by looping through the all_candidates object."); 

    for (var item in all_candidates) 
     document.write("Storage mechanism " + item + 
      " returned " + all_candidates[item] + " votes<br>"); 
} 
ec.get("id", getCookie); 

// we look for "candidates" based off the number of "cookies" that 
// come back matching since it's possible for mismatching cookies. 
// the best candidate is very-very-likely the correct one 

Answer 1

在這個例子中，cookie的名稱是 '身份證' 給出，所以這裏的你如何檢查它在PHP：

<?php 
if (isset($_COOKIES['id'])) { 
    //... cookie was set 
} else { 
    //... no cookie was set 
    setcookie('id',$somenumber) ; 
} 
?> 

不幸，這隻會設置主要的HTTP cookie，而不是所有其他的evercookie元素。但是，在下一次刷新時，永不過時的代碼應該檢測到它的一個元素包含一個值，並將所有其他元素設置爲相同的值。