how to use captcha in html page

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

After groping, finally can apply the verification code in Laravel 5.1.Because the English slag five levels, so almost no search for anything useful, so consider on GitHub search verification Code pack!Note: The package on GitHub often has

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

ProblemIn a less fortunate situation, people use automated programs to submit forms, causing a lot of rubbish throughout the internet. One way to prevent this is to use a CAPTCHA---CAPTCHA: fully automated to differentiate between computer and human

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),

Topics Many automatedProgramThe form is automatically submitted, causing a large amount of junk data on the Internet. To prevent this situation, we have implemented a graphic Verification Code (CAPTCHA:Completely automated public Turing test to

1 , forwarding, and redirection httpservletresponse response forwarding: RequestDispatcher Dispatcher= Request.getrequestdispatcher ("/secondservlet");Request.setattribute ("pwd", "123");//The value set here can be obtained in the

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

Http://htsoft.org/html/y2011/822_using-htmlunit-landing-site-with-captcha-image.htmlUse Htmlunit to log in a website with captcha imagesSeptember 15, 2011 ⁄ programming language ⁄ a total of 1266 characters ⁄ font size small big ⁄ no comments ⁄ read

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