请教一下验证码的实现原理
请问一下验证码的实现原理
验证码是很有必要的，可为什么像百度贴吧那些的，它的验证码上面要弄些斑斑点点的来干扰视觉辨认呢？我觉得不用干扰也可以的呀。
还有就是请问验证码的实现及应用原理是什么？有人可以简要的说明一下吗？谢谢
我的感觉是用验证码应该要用的html里的hidden元素，不知对否？
------解决方案--------------------
不干扰一下，别人很轻易使用orc识别技术伪装获取你的验证码的，这样他们就轻易制作信息发布机器人了
------解决方案--------------------
填写界面显示随机数让用户填写到表单，且这个随机数写入SESSION，提交后处理代码判断用户有没有这个提交随机数且和session中的值比较，然后....
------解决方案--------------------
可这个服务器端怎么知道$_SESSION[ 'verify ']这个session变量是属于哪个客户端浏览器的呢？
答: 每个浏览客户端都会和服务器建立一个唯一的SESSION
------解决方案--------------------
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
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
CakePHP Project Configuration
Sep 10, 2024 pm 05:25 PM
In this chapter, we will understand the Environment Variables, General Configuration, Database Configuration and Email Configuration in CakePHP.
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
CakePHP Date and Time
Sep 10, 2024 pm 05:27 PM
To work with date and time in cakephp4, we are going to make use of the available FrozenTime class.
CakePHP File upload
Sep 10, 2024 pm 05:27 PM
To work on file upload we are going to use the form helper. Here, is an example for file upload.
CakePHP Routing
Sep 10, 2024 pm 05:25 PM
In this chapter, we are going to learn the following topics related to routing ?
Discuss CakePHP
Sep 10, 2024 pm 05:28 PM
CakePHP is an open-source framework for PHP. It is intended to make developing, deploying and maintaining applications much easier. CakePHP is based on a MVC-like architecture that is both powerful and easy to grasp. Models, Views, and Controllers gu
CakePHP Creating Validators
Sep 10, 2024 pm 05:26 PM
Validator can be created by adding the following two lines in the controller.
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
