why use captcha in website

in the process of Web development , Verification code is often used to prevent the robot from constantly submitting data and causing the website to be paralyzed . Yii provides a verification code plug- in, that is , Captcha. The first step:using in

The content of this tutorial is close to the technical direction I am good at: Safe contact forms. As I mentioned in the previous tutorial, A common contact form helps a visitor communicate with you without exposing your email address to the

What is the website Verification Code generally placed on the server? Why? Are the website verification codes of javaphp.net stored in the same place? What is the website Verification Code generally placed on the server? Why? Are website

12306 automatic ticket placement-Logon, 12306 ticket placement 12306 after the website launches the image verification code, it puts forward higher requirements for the ticketing software. This article does not involve automatic identification

Apache Shiro is a powerful and easy-to-integrate open-source rights framework that enables authentication, authorization, encryption, session management, and more. Authentication and authorization are the core of authority control, simply,

Apache Shiro is a powerful and easy-to-integrate open-source rights framework that enables authentication, authorization, encryption, session management, and more. Authentication and authorization are the core of authority control, simply,

Apache Shiro is a powerful and easy-to-integrate open-source rights framework that enables authentication, authorization, encryption, session management, and more. Authentication and authorization are the core of authority control, simply,

Where does the site verification code usually be placed on the server side? Why? Does the Java PHP. NET website Verification code be put in the same place? Reply content: Where does the site verification code usually be placed on the server

Verification Code yesterday, today, and tomorrow Why use the verification code? Without a verification code, attackers can use harmful programs to automatically register a large number of Web Service accounts, and then attackers can use these

12306 ticket sales website new version Verification code identification confrontationIn the previous article 12306, the official website pushed the new "image verification code" to grab the ticket software or the collective failure. 12306 the