Example of PHP Realizing redis Restricting Access Times of Single ip and Single User

This article describes the example of PHP to achieve redis limit single ip, single user access function. Share it for your reference, as follows:

Sometimes we need to limit the frequency of one api or page access, for example, a single ip or how many times a single user can access it in one minute

Requirements like this are easy to implement with Redis

<?php
$redis = new Redis();
$redis->connect('127.0.0.1', 6379);
$redis->auth("php001");
// This key Record the ip Number of visits to   It can also be changed to a user id
//$key = 'userid_11100';
$key=get_real_ip();
// Limit the number of times 5
$limit = 5;
$check = $redis->exists($key);
if($check){
  $redis->incr($key);
  $count = $redis->get($key);
  if($count > 5){
    exit(' Requests are too frequent, please try again later! ');
  }
}else{
  $redis->incr($key);
  // The limit time is 60 Seconds 
  $redis->expire($key,60);
}
$count = $redis->get($key);
echo ' No. 1  '.$count.'  Secondary request ';
// Get client real ip Address 
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;
}
?>

For more readers interested in PHP related content, please check the topics on this site: "Summary of php+redis Database Programming Skills", "Introduction to php Object-Oriented Programming", "Introduction to PHP Basic Grammar", "Encyclopedia of PHP Array (Array) Operation Skills", "Summary of php String (string) Usage", "Introduction to php+mysql Database Operation Skills" and "Summary of php Common Database Operation Skills"

I hope this article is helpful to everyone's PHP programming.