bypass captcha

The following is my own encapsulation of the Verification Code tool class, in peacetime projects will be more often used in the tool class, the current package of this tool class simple version, if the need for a partner can be used, of course, I recommend using the configuration file before adding some options information //Verification Code Width Private $width; //Verification Code Height Private $height; //Number of validations Private $length; //number of interference points P

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

1. Origin: Based on the WCM6 of TRS, the Administrator Password Vulnerability can be directly obtained. 2. First, access the wcm directory and the logon page is automatically displayed: 3. Add the following link to view the administrator password: wcm/infoview. do? Serviceid = wcm6_user MethodName = getUsersByNames UserNames = admin * the previous vulnerability indicates that viewing administrator information is not harmful because MD5 encryption is only half-captured, in addition, even if the

Use the QQ space storage XSS vulnerability with the CSRF vulnerability to hijack other website accounts (sensitive tag 403 interception can bypass \ 403 bypass) 1. All tests are from the fuzz test (all are determined based on the returned content. If any judgment error occurs, sorry)2. the XSS output point is not filtered. However, if a sensitive tag keyword is entered, the Server Returns Error 403, but it

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

, You need to register the domain nameReCAPTCHAWebsite. After registration, you will receive the private key and public key for your website. Copy and save them for future use. Modify the settingsCode. InBookcomments/IndexMake a small modification to the view. This is the previously created page for adding comments.AjaxRequest, displayedCAPTCHAWhen the request is complete,Displaycaptcha"JavascriptMethod. @ Model ienumerable Mvcapplication4 . Models. bookcomment > @{Viewbag. Title = "Ind

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

create_validate_code (size= (+), Chars=init_chars, img_type=" GI F ", mode=" RGB ", bg_color= (255, 255, 255), fg_color= (0, 0, 255), FO Nt_size=18, Font_type=fonttype, length=4, Draw_lines=true, n_line= (1, 2), draw_points=true, point_chance = 2): "@todo: Generate CAPTCHA image @param size: size of picture, format (wide, high), default to (+) @param chars: Allowed character set, format string @param img_type: Picture saved format, default GIF, optio

Since the company is renting virtual space and using an IIS server, there are a number of problems when deploying PHP: For example, we encountered this problem yesterday: Deploying the Thinkphp Project under IIS, the CAPTCHA cannot be displayedHere's how to generate the verification code://making a special method to implement CAPTCHA generation functionverifyimg () {//The following class verify did not i

Laravel5.2 use Captcha to generate a verification code for Logon (session pitfall), laravel5.2captcha Recently, a friend asked me to help with laravel's verification code login, so I did a little research. (I forgot how to use laravel) First, install laravel and I will not go into details next. My version is 5.2.45 (note: the middleware of laravel5.2.6 or later can be automatically loaded). This is quite important. After the installation is complete,