使用redis进行ip限速

ip-rating.php

<?php  
$redis = new Redis();  
$redis->connect('127.0.0.1', 6379); 
$redis->auth("php001");
//这个key记录该ip的访问次数 也可改成用户id 
//$key = 'userid_11100';
$key=get_real_ip();
 
//限制次数为5
$limit = 5;
 
$check = $redis->exists($key);
if($check){
    $redis->incr($key);
    $count = $redis->get($key);
    if($count > 5){
        exit('请求太频繁，请稍后再试！');
    }
}else{
    $redis->incr($key);
    //限制时间为60秒 
    $redis->expire($key,60);
}
 
$count = $redis->get($key);
echo '第 '.$count.' 次请求';
 
//获取客户端真实ip地址
function get_real_ip(){
    static $realip;
    if(isset($_SERVER)){
        if(isset($_SERVER['HTTP_X_FORWARDED_FOR'])){
            $realip=$_SERVER['HTTP_X_FORWARDED_FOR'];
        }else if(isset($_SERVER['HTTP_CLIENT_IP'])){
            $realip=$_SERVER['HTTP_CLIENT_IP'];
        }else{
            $realip=$_SERVER['REMOTE_ADDR'];
        }
    }else{
        if(getenv('HTTP_X_FORWARDED_FOR')){
            $realip=getenv('HTTP_X_FORWARDED_FOR');
        }else if(getenv('HTTP_CLIENT_IP')){
            $realip=getenv('HTTP_CLIENT_IP');
        }else{
            $realip=getenv('REMOTE_ADDR');
        }
    }
    return $realip;
}
?>