When generating verification code text on an image, the position of the text on the image and the color of each text are mainly considered.
Control the x-axis position of the n-th text = (image width / verification code length) * (n-1) random offset number; where n = {d1....n}
Control the y-axis position of the nth text = image height / 2 random offset number;
mt_rand(0, 156) randomly selects the text color. The purpose of 0-156 is to select a darker color.
mt_rand(-30, 30) Random text rotation.
All resources on this site are contributed by netizens or reprinted by major download sites. Please check the integrity of the software yourself! All resources on this site are for learning reference only. Please do not use them for commercial purposes. Otherwise, you will be responsible for all consequences! If there is any infringement, please contact us to delete it. Contact information: admin@php.cn
Related Article
Use GD library to do verification code in php, phpgd library verification code_PHP tutorial
12 Jul 2016
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
Very practical php verification code class, very practical php verification code_PHP tutorial
12 Jul 2016
Very practical php verification code class, very practical php verification code. Very practical php verification code class, very practical php verification code This example shares the php verification code class for your reference. The specific content is as follows php /** * * @author Administrator * *
PHP generates verification code, thumbnail and watermark image class sharing, verification code watermark_PHP tutorial
12 Jul 2016
PHP generates verification codes, class sharing of thumbnails and watermarks, and verification code watermarks. Class sharing for php to generate verification codes, thumbnails and watermarks. Verification code watermark encapsulates a class that can generate verification codes, thumbnails and watermarks. Share it with everyone. phpclass image{ sessio
Simple and safe PHP verification code with calling method, PHP verification code with calling_PHP tutorial
12 Jul 2016
Simple and secure PHP verification code with calling method, PHP verification code with calling method. Simple and secure PHP verification code with calling method, PHP verification code with call. 1. Verification code example 2. PHP verification code class, secoder.class.php php /** * Security verification code * * Secure verification
PHP implementation is suitable for custom verification code classes, php verification code
06 Jul 2016
PHP implementation is suitable for custom verification code classes, php verification code. PHP implementation is suitable for custom verification code classes, php verification code. The example of this article shares the PHP verification code class for everyone, and uses objects to implement the verification code class for your reference. The specific content is as follows
A practical php verification code function, php verification code_PHP tutorial
12 Jul 2016
A practical php verification code function, php verification code. A practical php verification code function, php verification code This article shares several php verification code functions for everyone, they are very practical, the specific content is as follows Code segment 1: Simple php verification code function
Hot Tools
PHP dynamically randomly generates verification code class
PHP dynamically randomly generates verification code class
Simple and easy-to-use PHP verification code class
Simple and easy-to-use PHP verification code class
A PHP verification code generation code
A PHP verification code generation code