这篇文章主要介绍了php中用memcached实现页面防刷新功能,这是一个比较安全、稳定的防刷新方案,需要的朋友可以参考下
有个新需求要加上去,防止用户频繁刷新页面。具体需求是当用户在一分钟之后内请求指定的页面超过100次,就直接拒绝请求。仔细分析后发现这个功能用memcache来做最方便:
1、以用户IP和被请求的文件名作为KEY值。
2、以memcached的方法increment()来自增记录用户访问次数,increment()是原子性增加,准确。
3、设置set()时指定过期时间为60s,这样就统计一分钟的访问次数。
于是写了个函数放在项目的初始化文件中调用,函数内容如下:
function requestCount(){ $patharr = pathinfo($_SERVER['PHP_SELF']); $filename = explode('?',$patharr['basename']);//获取当前文件名 if( in_array($filename['0'],array('index.php','login.php','password.php')) ){ global $memcache; $clientip = get_client_ip(); //使用长整型IP和文件名生成KEY $ipkey = 'C'.sprintf("%u", ip2long( $clientip )). $filename['0'] ; if( $visitCount = $memcache->get($ipkey) ){ if($visitCount == 100){ die('
Please don\'t refresh your page!
'); }else{ $memcache->increment($ipkey); } }else{ $memcache->set($ipkey,1,0,60); } } } ,
Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

WebStorm Mac version
Useful JavaScript development tools

Atom editor mac version download
The most popular open source editor

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software