js graphic verification code plug-in

16 May 2016

This article mainly introduces the jQuery plug-in to implement static HTML verification code verification. Friends in need can refer to it.

10 May 2018

The logic of the image sliding verification code is to determine whether it is a human operation based on the mouse sliding trajectory, coordinate position, calculation of drag speed, etc. Of course, the following code only implements the front-end part and only records the drag coordinates. This article mainly introduces the js plug-in to implement the image sliding verification code and sliding module in detail to realize the verification function. It has certain reference value. Interested friends can refer to it. I hope it can help everyone.

25 Jun 2018

This article mainly introduces the jQuery plug-in Validate method to implement custom verification result styles. Interested friends can refer to it.

12 Jun 2023

With the rapid development of the Internet, graphic-based verification codes have become an important part of website security. Verification codes can effectively prevent robots or malicious programs from automating operations on the website, and can also ensure the security of user information. In website development based on ThinkPHP6, how to implement the operation of captcha graphic verification code? This article will introduce you to the specific operation process. 1. Generate Captcha graphical verification code 1. Use the captcha library to install it in ThinkPHP

02 Jun 2023

First, we need to open the official website of ThinkPHP and search for content related to the verification code. From the search results, we can see some verification code documents and already developed verification code plug-ins. In this article, we will use the officially provided verification code plug-in and integrate the verification code by manually writing code. 1. Use the official verification code plug-in. In the official documentation, we can find how to use the ThinkPHP verification code plug-in. To use the official plug-in, you need to perform the following steps: 1.1 Create a new Verify folder in the extend directory of the ThinkPHP framework and put the downloaded verification code plug-in into it. 1.2 View ThinkPHP configuration

12 Oct 2017

Life cycle of verification code In web applications, verification code is often used for login and registration. The verification code is essentially a picture. Let's take a look at the life cycle of the verification code: The client requests the verification code. The server renders the verification code: Renders a picture containing a random string. Writes the random string into the session. Reads the picture and returns the response. The client submits: Display the response (i.e. Verification code image) Get user input string

 

类似于下面这样
1.利用GD库函数生成图片，并在图片上写指定字符
imagecreatetruecolor 新建一个真彩色图像
imagecolorallocate 为一幅图像分配颜色(调色板) <" alt="GD library in PHP5 generates graphic verification code (with Chinese characters)_PHP tutorial">

21 Jul 2016

The GD library in PHP5 generates graphic verification codes (with Chinese characters). Use the GD library in PHP5 to generate a graphic verification code similar to the following 1. Use the GD library function to generate a picture and write the specified characters on the picture imagecreatetruecolor Create a new true color image image

22 Oct 2016

Provides various official and user-released code examples and code references. Everyone is welcome to exchange and learn.

15 Aug 2018

What this article brings to you is about how to implement front-end verification code in js? (code), it has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.​