php IP黑名单

//IP黑名单
$ip = funip(getIp()) ? getIp() : '';
$ip_arr = explode(',','127.0.0.1,192.168.1.1');
if(in_array($ip, $ip_arr)){
    exit('黑名单');
}

/**
 * 获取用户ip地址
 */
function getIp(){
    $ip = $_SERVER['REMOTE_ADDR'];
    if(isset($_SERVER['HTTP_X_FORWARDED_FOR']) && preg_match_all('#\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}#s', $_SERVER['HTTP_X_FORWARDED_FOR'], $matches)) {
        foreach ($matches[0] AS $xip) {
            if (!preg_match('#^(10|172\.16|192\.168)\.#', $xip)) {
                $ip = $xip;
                break;
            }
        }
    } elseif (isset($_SERVER['HTTP_CLIENT_IP']) && preg_match('/^([0-9]{1,3}\.){3}[0-9]{1,3}$/', $_SERVER['HTTP_CLIENT_IP'])) {
        $ip = $_SERVER['HTTP_CLIENT_IP'];
    } elseif (isset($_SERVER['HTTP_CF_CONNECTING_IP']) && preg_match('/^([0-9]{1,3}\.){3}[0-9]{1,3}$/', $_SERVER['HTTP_CF_CONNECTING_IP'])) {
        $ip = $_SERVER['HTTP_CF_CONNECTING_IP'];
    } elseif (isset($_SERVER['HTTP_X_REAL_IP']) && preg_match('/^([0-9]{1,3}\.){3}[0-9]{1,3}$/', $_SERVER['HTTP_X_REAL_IP'])) {
        $ip = $_SERVER['HTTP_X_REAL_IP'];
    }
    return $ip;
}
/**
 * 检测是否为IP
 * @param  [type] $ip [description]
 * @return [type]     [description]
 */
function funip($ip){
  //IP正则匹配
  //0.0.0.0--- 255.255.255.255
    $pat = "/^(((1?\d{1,2})|(2[0-4]\d)|(25[0-5]))\.){3}((1?\d{1,2})|(2[0-4]\d)|(25[0-5]))$/";
    if(preg_match($pat,$ip)){
        $num = preg_match($pat,$ip);
        return $num;
    }else{
        $num = preg_match($pat,$ip);
        return $num;
    }
}

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