php使用Redis限制IP访问次数
## 使用Redis限制IP访问次数
<?php
$redis = new Redis();
$redis->connect('127.0.0.1', 6379); //连接 Redis
if (!$redis->exists(get_real_ip())){
//第一次访问
$redis->set(get_real_ip(),1,5*60); // 设置5分钟过期时间并设置初始值1
}else{
//已经记录过IP
if ($redis->get(get_real_ip())<30){ //判断IP有没有到达拉黑阈值
$redis->incr(get_real_ip()); //次数加一
}else{
echo '请稍后访问!';exit;
}
}
function get_real_ip($type = 0,$adv=false) {
$type = $type ? 1 : 0;
static $ip = NULL;
if ($ip !== NULL) return $ip[$type];
if($adv){
if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
$arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
$pos = array_search('unknown',$arr);
if(false !== $pos) unset($arr[$pos]);
$ip = trim($arr[0]);
}elseif (isset($_SERVER['HTTP_CLIENT_IP'])) {
$ip = $_SERVER['HTTP_CLIENT_IP'];
}elseif (isset($_SERVER['REMOTE_ADDR'])) {
$ip = $_SERVER['REMOTE_ADDR'];
}
}elseif (isset($_SERVER['REMOTE_ADDR'])) {
$ip = $_SERVER['REMOTE_ADDR'];
}
$long = sprintf("%u",ip2long($ip));
$ip = $long ? array($ip, $long) : array('0.0.0.0', 0);
return $ip[$type];
}
