= random.nextint (height); int xl = Random.nextint (50); int yl = Random.nextint (50); //Dots G.drawoval (x, Y, 1, 1); Line G.drawline (x, y, X + xl, y + yl); } The //Randomcode is used to save randomly generated verification codes for user login verification StringBuffer Randomcode = new StringBuffer (); int red = 0, green = 0, blue = 0; //Random generation of Codecount number
The first is to create a new authentication code page validatecode.aspx
Defining variables that's good for later revisions.
Copy Code code as follows:
private int codelen = 4;//Verification Code length
private int fineness = 85;//picture sharpness
private int
Php uses memcahe for caching. The written interface cannot use the session. How to use memcahe to cache the verification code stored in php during text message verification code execution. The written interface cannot use the session. When you do the text message verification
Create a verification code based on PHP and a verification code based on PHP
The registration code is required to verify the validity of the current operator. In order to prevent the website from being maliciously registered by machines.
There are only a few steps to generat
Create and verify the verification code when logging on to asp.net, and verify the asp.net verification code.
1. Create a page, ImageCode. aspx
2. Add the following code to Page_Load:
String tmp = RndNum (4 );HttpCookie a = new HttpCookie ("ImageV", tmp );Response. Cookies.
Verification code based on JavaScript, javascript Verification Code
The example in this article shares the code for implementing the verification code in Javascript for your reference.
In linux, the php verification code only displays the canvas. the ultimate solution is not to display the verification code. After passing the test, first release my code [php]? Phpsession_start (); ** remove boom to UTF-8 * vCode (m, n, x, y). The size of m digits is n-side
How to align the text box and Verification Code image and align the text box Verification Code
How to align text boxes and Verification Code images:By default, if the text box and the image are in the same element, vertical align
This article mainly explains how to generate an image verification code in php, including a digital verification code, a digital and letter verification code, a Chinese verification
Asp.net generates a hybrid graphic verification code for letters and numbers, and an asp.net Verification Code
Verification code is an important technology in website development. It can prevent unauthorized users from using regis
A simple ASP. NET verification code and a simple ASP. NET Verification Code
The example in this article shares the code of the ASP. NET verification code for your reference. The details
Some browsers cache the verification code, causing the verification code to expire when you re-open the page. Refresh the browser.
How can this problem be solved? what code can force the verification
This article through the source code show how to implement the form submission, the verification code first detect correctness, incorrect then do not submit the form, update the verification code.1. Front-end Code index.html 2, b
Verification code recognition and verification code recognition platform
It has been a long time since I wrote my blog last time. In fact, this verification code recognition module was written by myself as a lazy blog. Now I have
Verification Code countdown in android, android Verification Code
1. Implement the countdown effect of a Verification Code
2. Implementation
In the figure, the verification
I have previously written a verification code number that identifies a single background and a single font size by comparing the verification code number region. After writing the code, I found that many websites only change the verifica
PHP generates cool four character verification code, PHP generates cool verification code
The example of this article for everyone to share the code of PHP generated verification codes, for your reference, the specific content as
1. Function descriptionWhen the user wants to get the verification code, click Free to get the verification code, and then start the countdown, the Countdown period button text for the remaining time x seconds, and not press the status, after the countdown ended, the button changed to click Resend.2. AnalysisThe timer
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