asp captcha

In this paper, the method of using CAPTCHA verification code for Yii is described. Share to everyone for your reference, as follows: The detailed code can refer to: the example code of YII comes with The Post project, which has a contact form with the verification code. 1. Model: Add a verification code to a property of Userlogin: Class Userlogin extends cformmodel{public $username, public $password, public $rememberMe, public $verifyCode; Ction rul

This article mainly introduces how Yii uses Captcha verification code, and analyzes the three-layer MVC implementation skills of Yii using Captcha verification code in combination with examples, for more information about how Yii uses Captcha verification codes, see the following example. We will share this with you for your reference. The details are as follows:

Example of the CI framework Verification Code CAPTCHA auxiliary function usage, cicaptcha This article describes how to use the CAPTCHA helper function of the CI framework verification code and shares it with you for your reference. The details are as follows: The CAPTCHA helper function is used to conveniently generate verification codes. However, the images are

Javaweb Learning Summary (ix)-Generate a CAPTCHA image from a servletBufferedImageClass IntroductionGenerate the CAPTCHA image is mainly used in a BufferedImage class, as follows:Create a drawimage Servlet to generate the captcha picture 1 package gacl.response.study; 2 Import Java.awt.Color; 3 Import Java.awt.Font; 4 Import Java.awt.Graphics; 5 Import Java.

First,BufferedImageClass IntroductionGenerate the CAPTCHA image is mainly used in a BufferedImage class, as follows:Create a drawimage Servlet to generate the captcha picture 1 package gacl.response.study; 2 Import Java.awt.Color; 3 Import Java.awt.Font; 4 Import Java.awt.Graphics; 5 Import Java.awt.Graphics2D; 6 Import Java.awt.image.BufferedImage; 7 Import java.io.IOException; 8 Import Java.util.R

This article mainly describes the Laravel5.2 use CAPTCHA Generate verification code (session pit), the need for friends can refer to the next Recently a friend asked me to help out. Laravel's verification code landing, so a little study of a bit. (I almost forgot how to use Laravel.) First of all, the installation of Laravel will not have to repeat it, my version is 5.2.45 (note: laravel5.2.6 version of the middleware can be loaded automatically), th

This article introduces a very good code generation PHP program, first when the user requests HTTP, the server side creates a unique SessionID, this is the session ID, and then to start the GD library or ImageMagick these drawing tools, The random characters generated by the program are written into a picture, then displayed to the client, and then by the user input submitted data, and then our program to save the build validation in the session to compare, so that the verification code to compl

In this paper, the method of using CAPTCHA verification code for Yii is described. Share to everyone for your reference, as follows: The detailed code can refer to: the example code of YII comes with The Post project, which has a contact form with the verification code. 1. Model: Add a verification code to a property of Userlogin: Class Userlogin extends cformmodel{public $username, public $password, public $rememberMe, public $verifyCode; Ction rule

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), is a public automatic program that distinguishes whether a user is a computer or a person. Can prevent: Malicious hack password, brush tickets, forum irrigation, effectively prevent a hacker to a particula

• Create a new PHP file captcha_code_file.php The code is as follows Copy Code Open Session FirstSession_Start ();Define foreground display verification code length width$image _width = 120;$image _height = 40;$characters _on_image = 6;$font = './monofont.ttf '; The characters that can is used in the CAPTCHA code.Avoid confusing characters (l 1 and I for example)$possible _letters = ' 23456789bcdfghjkmnpqrstvwxyz ';$rando

Yii built-in CAPTCHA can basically meet most of the requirements, if you have special requirements for the verification code, you can customize the CAPTCHA, this is mainly through the expansion of ccaptchaaction to achieve, this example to customize a validation code function, randomly generated within 10 of addition and subtraction, The user needs to calculate the correct results to pass the validation.Thi

First understand some of the functions in the parent class Verity.class.php (thinkphp/library/think/verity.class.php)1:check () Verify that the verification code is correct2:entry () output The verification code and save the value of the verification code in the session3:authcode () Encryption Verification code (this method is called in the Check () method)The controller generates the CAPTCHA code://Verification Code functionverifyimg () {//Verific

This article illustrates the method used by Yii to use CAPTCHA authentication codes. Share to everyone for your reference, specific as follows: Detailed code can refer to: Yii from the sample Code post project, which has a contact table alone to the verification code. 1. Model: Add a validation code to an attribute of Userlogin: Class Userlogin extends Cformmodel {public $username; public $password; public $rememberMe; public $verifyCod

This paper illustrates the use of CI frame Verification Code captcha auxiliary function, and share it for everyone's reference. Specifically as follows: Using the Captcha helper function is very convenient to generate the verification code, but the picture is stored in the folder, not the output stream, feel not perfect enough to use. Description: Generates 4-bit random number, CI root directory to establ

question No. 0010: use Python to generate an image similar to the letter code in Reading materials Idea: First randomly generate a verification code, and then use the Python PiL library to draw the image of the activation code, the specific point is to create a canvas, add verification code word up, add noise to the interference, and then fuzzy processing, and then saved to the name of the verification code in the picture.0010. Generate a captc