how to implement captcha in html

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),

Implement the ajax pop-up window login function in ECSHOP and ecshopajax pop-up window Login In the previous article, we introduced how to use the openSpeDiv method to implement the Ecshop logon window. Click here for reference. The following

Teach you how to implement verification code PHP, PHP implementation Verification code Verification code in the form implementation more and more, but with JS write verification code, always feel inconvenient, so learned the next PHP implementation

When generating a form from a form widget at the view level, field can only exist in the database, for example: use yii\helpers\html; Use Yii\widgets\activeform; Use Yii\captcha\captcha; ' Sign-form ', ' Options ' =>[' action ' = '

Teach you how to implement the verification code in php and implement the verification code in php. It is inconvenient to teach you how to implement a verification code in php. more and more verification codes are implemented in forms, so I learned

PHP uses curl to perform a mock login to a website with a verification code, curl Verification Code Many of the online simulation login programs, mostly through the service program Apache and other operations, get to the verification code displayed

Author: hutuworm Source: Confused and greedy temple At present, many websites in order to prevent users to use the robot automatic registration, login, irrigation, have adopted a Verification code technology. The so-called verification Code, is a

In web development in order to provide user experience we mostly use Ajax to do some things, let me introduce an AJAX implementation of the non-refreshed page verification code AJAX verification of the needs of friends can be consulted. Verification

Clickjacking. Welcome back to "this week in HTML 5," where I'll try to summarize the major activity in the ongoing standards process in the whatwg and W3C HTML Working Group. Work continued this week on web forms 2, but I'm going to hold off on