Supports numbers, letters, Chinese characters, and mixed PHP verification code classes

25Jul2016

Verification code PHP class supports numbers, letters, Chinese characters, mixed

13Jul2016

Supports PHP verification codes in Chinese, letters, and numbers. Supports PHP verification codes in Chinese, letters, and numbers. This article demonstrates 5 types of verification codes with examples and introduces the function for generating verification codes. The principle of PHP generating verification code: Generate a verification code through the GD library

13Jan2017

There are three types of verification code sample codes in asp.net, which are numbers, mixed numbers and letters, and Chinese characters. Friends in need can refer to the following.

25Jul2016

PHP generates graphic verification code (mixed uppercase and lowercase letters and numbers)

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

14Jul2023

Tips for generating random verification code images using PHP and GD libraries. Random verification code images are a common security verification mechanism in website development. It requires users to enter the correct verification code to continue the operation. In this article, we will introduce techniques on how to generate random verification code images using PHP and the GD library. The GD library is an open source library for processing images, which provides PHP with rich image processing functions. By using the GD library, we can easily generate various verification code images. First, we need to create a PHP file named