用cookie对用户在某个时间范围内的提交次数进行计数

1. <?php
   
2. /**
   
3.  * @author flynetcn
   
4.  */
   
5. class utils_spam
   
6. {
   
7.     /**
   
8.      * 用cookie对用户在某个时间范围内的提交次数进行计数
   
9.      * @param str $counterKey cookie键
   
10.      * @param int $intervalSec 多少秒内
    
11.      * @return int 本次累计后的计数
    
12.      */
    
13.     public static function submitCounter($counterKey, $intervalSec=300)
    
14.     {
    
15.         if (!isset($_COOKIE[$counterKey])) {
    
16.             $_COOKIE[$counterKey] = array('c'=>1, 't'=>time());
    
17.         } else {
    
18.             if (!is_array($_COOKIE[$counterKey])) {
    
19.                 $_COOKIE[$counterKey] = unserialize(base64_decode($_COOKIE[$counterKey]));
    
20.             }
    
21.             if (time() - $_COOKIE[$counterKey]['t'] > $intervalSec) {
    
22.                 $_COOKIE[$counterKey] = array('c'=>1, 't'=>time());
    
23.             } else {
    
24.                 $_COOKIE[$counterKey]['c']++;
    
25.             }
    
26.         }
    
27.         setcookie($counterKey, base64_encode(serialize($_COOKIE[$counterKey])), time()+$intervalSec);
    
28.         return $_COOKIE[$counterKey]['c'];
    
29.     }
    
30. 
    
31.     /**
    
32.      * 获取当前计数值
    
33.      * @param str $counterKey cookie键
    
34.      * @return int 当前计数
    
35.      */
    
36.     public static function getSubmitCounter($counterKey)
    
37.     {
    
38.         if (!isset($_COOKIE[$counterKey])) {
    
39.             return 0;
    
40.         } else {
    
41.             if (!is_array($_COOKIE[$counterKey])) {
    
42.                 $_COOKIE[$counterKey] = unserialize(base64_decode($_COOKIE[$counterKey]));
    
43.             }
    
44.             return $_COOKIE[$counterKey]['c'];
    
45.         }
    
46.     }
    
47. }