Table of Contents
回复内容:
Home Backend Development PHP Tutorial 如何实现同一IP提交表单的次数限制?

如何实现同一IP提交表单的次数限制?

Jun 06, 2016 pm 08:07 PM
php

如何实现同一IP提交表单的次数限制?
比如说:我开发了一个投票程序,要求同一IP在两个小时内只能投一次票(即成功提交一次)。该如何写代码?
(初学者,问题可能有些白痴,请耐心回答,谢谢)

回复内容:

如何实现同一IP提交表单的次数限制?
比如说:我开发了一个投票程序,要求同一IP在两个小时内只能投一次票(即成功提交一次)。该如何写代码?
(初学者,问题可能有些白痴,请耐心回答,谢谢)

关注微信公众号:phpgod(PHP技术大全),每日精彩分享不间断。
第一步,创建表,DDL如下:
CREATE TABLE ip_limit (
id int(11) NOT NULL AUTO_INCREMENT COMMENT '自增id',
ip char(16) NOT NULL DEFAULT '0' COMMENT 'ip地址',
form_id int(11) NOT NULL DEFAULT '0' COMMENT '表单id',
last_submit_time int(11) NOT NULL DEFAULT '0' COMMENT '上次提交表单时间',
success_submit_times int(11) NOT NULL DEFAULT '0' COMMENT '成功提交次数',
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
第二步,需求逻辑,描述如下:
当用户进行第一次提交时,插入一条记录到ip_limit表,并记住ip,form_id,last_submit_time,success_submit_times等字段信息,当用户进行更多次提交时,先查询对应ip对于指定form_id的last_submit_time,如果current_time - last_submit_time>2*3600,就更新last_submit_time,success_submit_times字段信息,否则提示相关限制信息。

保存到redis,设置生存周期为2小时
键为ip,值为访问次数。
每次投票检查次数,超过返回错误,未超过限制就允许投票,并把次数加一

缓存到文件
session
redis等内存数据库
MySQL等SQL数据库

都可以实现

各有优劣,速度,效率,看如何取舍。当然也要看服务的精确性。

如果用client的javascript来限制提交次数的话也不可靠,如果有人直接改javascript的话就可以绕过这个限制。
可以从服务端的request里面可以拿到客户端的ip地址,然后你就知道怎么做了,不过这种方法对于某些客户使用代理上网的话就有问题了。

使用缓存去检测

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

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

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian Dec 24, 2024 pm 04:42 PM

PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

How To Set Up Visual Studio Code (VS Code) for PHP Development How To Set Up Visual Studio Code (VS Code) for PHP Development Dec 20, 2024 am 11:31 AM

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

PHP Program to Count Vowels in a String PHP Program to Count Vowels in a String Feb 07, 2025 pm 12:12 PM

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

How do you parse and process HTML/XML in PHP? How do you parse and process HTML/XML in PHP? Feb 07, 2025 am 11:57 AM

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

Explain late static binding in PHP (static::). Explain late static binding in PHP (static::). Apr 03, 2025 am 12:04 AM

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? Apr 03, 2025 am 12:03 AM

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.

PHP and Python: Comparing Two Popular Programming Languages PHP and Python: Comparing Two Popular Programming Languages Apr 14, 2025 am 12:13 AM

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

See all articles