Redis做登陆统计的简单代码例子

<?php  
   
/** 
 * @file     ISign.php 
 * @version  1.0 
 * @author   wade.zhan 
 * @date     2014-12-21 21:01:04 
 * @desc     基于Redis bitmap实现签到功能 
 */  
/** 
 * 每当用户在某一天上线的时候,我们就使用SETBIT,以用户名作为key, 
 * 将那天所代表的网站的上线日作为offset参数,并将这个offset上的为设置为1. 
 * 比如,如果今天是网站上线的第100天,而用户$uid=10001在今天阅览过网站, 
 * 那么执行命令SETBIT peter 100 1. 
 * 如果明天$uid=10001也继续阅览网站,那么执行命令SETBIT peter 101 1 ,以此类推.  
 * 当要计算$uid=10001总共以来的上线次数时,就使用BITCOUNT命令:  
 * 执行BITCOUNT $uid=10001 ,得出的结果就是$uid=10001上线的总天数.  
 * 签到后如果需要奖励判断可以另存key(uid:reward:day),里面可以存储对应的奖励及领奖标记位.  
 */  
class ISign {  
    const START_TIMESTRAMP = 1419091200; // 首日签到时间 20141221  
    private $redis = NULL;  
    public function __construct($config) {  
        $this->redis = new Redis();  
        $this->redis->connect($config['host'], $config['port'], $config['timeout'], NULL);  
    }  
    public function getSignKey($uid) {  
        return sprintf('sign:%d', $uid);  
    }  
    public function sign($uid, $now = NULL) {  
        if ($now === NULL) {  
            $now = time();  
        }  
        $offset = intval(($now - self::START_TIMESTRAMP) / 86400) + 1;  
        $signKey = $this->getSignKey($uid);  
        return $this->redis->setBit($signKey, $offset, 1);  
    }  
    public function getSign($uid, $now = NULL) {  
        if ($now === NULL) {  
            $now = time();  
        }  
        $offset = intval(($now - self::START_TIMESTRAMP) / 86400) + 1;  
        $signKey = $this->getSignKey($uid);  
        return $this->redis->getBit($signKey, $offset);  
    }  
    public function getSignCount($uid) {  
        $signKey = $this->getSignKey($uid);  
        return $this->redis->bitCount($signKey);  
    }  
}  
/* 测试用例 */  
$config = array(  
    'host' => '127.0.0.1',  
    'port' => 6379,  
    'timeout' => 1,  
);  
$sign = new ISign($config);  
$uid = 10086;  
for ($i = 1; $i <= 15; $i ++) {  
    $now = ISign::START_TIMESTRAMP + $i * 86400;  
    $ret = $sign->sign($uid, $now);  
    echo 'sign:'.$ret.PHP_EOL;  
    $getValue = $sign->getSign($uid, $now);  
    echo 'getSign:'.$getValue.PHP_EOL;  
}  
$count = $sign->getSignCount($uid);  
var_dump($count);