PHP verification code class based on GD library

25Jul2016

Example of php verification code (GD library generates verification code)

12Jul2016

In php, GD library is used for verification code, and phpgd library is used for verification code. Use GD library to do verification code in php, phpgd library verification code php require_once 'string.func.php';//Use GD library to do verification code/** *Add verification text* @param int $type * @param int $length */function

11May2023

With the development of the Internet, more and more websites need to use verification codes to prevent malicious registration, crawlers and other behaviors. Image verification code is a common form of verification code. It displays an image containing random characters or numbers, allowing users to enter the correct verification code before proceeding to the next step. This article will introduce how to use PHP and GD library to generate image verification codes. The GD library is an image processing library that can be used to generate, process and manipulate various image formats. PHP already has a built-in GD library and provides many functions for creating and manipulating graphs

15Jul2017

This article introduces in detail the PHP verification code class based on the GD library (supports Chinese and English fonts, backgrounds, interference points and lines, distortion...), which has certain reference value. Let's take a look at it together.

25Jul2016

Example of generating verification code by php GD library

12Jul2023

How to create a dynamic image verification code using PHP and GD library In web applications, in order to prevent bots and malicious attackers from automating operations, verification codes are often used, requiring users to enter a verification code to confirm their identity. By using PHP and GD library, we can easily create dynamic image verification codes. The GD library is an extension library for PHP that provides some functions for processing images. In this article, we will use the functions of the GD library to generate an image containing random characters and present it to the user as a verification code. No.