simple captcha html

How do I generate a captcha picture? Using the PHP gd? Ok,right. In fact, Zend's CAPTCHA module has been packaged well. This article explains how to use the Zend Captcha module. Environment installationFirst Zend The captcha need to install GD. See

Verification code is often used for landing pages, message pages, registration page, the principle of verification code is very simple: the use of GD library to create a picture, of course, the image must add the necessary interference code, and

PHP code for simple Verification Code identification, PHP CAPTCHA codes Always wanted to write this, after a long time today interest came to simply record. Verification Code Fully automatic distinguish between computer and human public Turing Test

Implementation of dynamic random verification code mechanism in PHPThe Verification Code (CAPTCHA) is the abbreviation for "Completely Automated public Turing test to tell Computers and humans Apart" (fully automated computer-and human-Turing test),

In PHP to generate verification code picture is quite simple, because in PHP provides us with the graphics Gd.dll Library, to enable the GD graphics library we just put PHP-GD in front of the php.ini; Method One The code is as follows

PHP generated Verification code file is a learning PHP friends should know the technology oh, this can not only make your site security to improve some, you can also note some machine registration and other problems Oh, below we will look at a

PHP Verification Code implementation codes (3 kinds), PHP captcha Code of 3 Verification code in the form implementation more and more, but with JS write verification code, always feel inconvenient, so learned the next PHP implementation of the

Small series for everyone to share a beautiful PHP code class. Need friends can come over to the reference! PHP Verification Code Class code Width= $width; $this->height= $height; $this->counts= $counts; $this->distrubcode=

In the actual project development often encounter verification code problems, such as landing page, Message page, registration page ... The principle of verification code is very simple: the use of the GD library to create a picture, the image of

Verification code in the form implementation more and more, but with JS write verification code, always feel inconvenient, so learned the next PHP implementation of the verification code. Well, there is nothing to do, but do not want to waste time,