<?php
$redis = new Redis();
$redis->connect('127.0.0.1', 6379);
$redis->auth("ecshopcx");
//这个key记录该ip的访问次数 也可改成用户id
//$key = 'userid_12345';
$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 = $_SERVER['HTTP_X_FORWARDED_FOR'];
        }
        elseif (isset($_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');
        }
        elseif (getenv('HTTP_CLIENT_IP'))
	{
            $realip = getenv('HTTP_CLIENT_IP');
        }
        else
        {
            $realip = getenv('REMOTE_ADDR');
        }
  }
  return $realip;
}