human verification code

Complete jsp page Verification Code instance, jsp page Verification Code This example shares the code of the sp page verification code for your reference. The details are as follows: Th

Android automatically reads the SMS verification code and android SMS Verification Code The system automatically obtains the SMS verification code of the mobile phone. The principle is to parse the SMS and obtain the

= 0; $ I $ Font_color = imagecolorallocate ($ im, mt_rand (0,255), mt_rand (0,255), mt_rand (0,255 ));Imagearc ($ im, mt_rand (-$ width, $ width), mt_rand (-$ height, $ height), mt_rand (30, $ width * 2), mt_rand (20, $ height * 2), mt_rand (0,360), mt_rand (0,360), $ font_color );}// Draw interference pointsFor ($ I = 0; $ I $ Font_color = imagecolorallocate ($ im, mt_rand (0,255), mt_rand (0,255), mt_rand (0,255 ));Imagesetpixel ($ im, mt_rand (0, $ width), mt_rand (0, $ height), $ font_color

PHP implementation of simple and practical Verification code class, PHP simple and practical Verification code This paper introduces the simple and practical verification code class of PHP implementation. Share to everyone for yo

Generate Verification Code summary and generate Verification Code Java verification code generation Summary 1. serialVersionUIDPrivate static final long serialVersionUID =-8501285780349046114L;Java serialization mechanism verifie

Digital English verification code and javascript verification code based on javascript The example in this article shares the code for implementing the digital English verification code

Very practical php Verification Code class, very practical php Verification Code This example shares the php Verification Code class for your reference. The details are as follows: The above is all the content of this article, ho

PHP verification code-Ajax verification implementation method. In website development, most of us use ajax to perform some operations to provide user experience, next, I will introduce a friend who needs to use ajax to implement the verification code for refreshing pages. in

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

Ecshop verification code, ecshop Verification Code call Tool for encapsulating verification codes:

Class captcha{Private $charset = ' abcdefghkmnprstuvwxyzABCDEFGHKMNPRSTUVWXYZ23456789 '; Random factor,Private $code; Verification Code StringPrivate $codelen = 4; Verification Code lengthPrivate $width = 150; WidthPrivate $height = 40; HeightPrivate $img; Graphics resource

In the previous project, if you need to use a captcha, basically are their own GDI + drawing out, easy to use, but there are some small problems, first of all, if less interference line, the security is not very high, the verification code is easily recognized by the machine, if more than painting too many interference lines, the robot recognition rate of decline, The recognition rate of the

1 //four-bit random verification code2Random ran=NewRandom ();3String str1 = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIGKLMNOPQRSTUVWXUZ";4 Char[] A=New Char[4];5 for(inti=0;i)6 {7A[i]=str1.charat (Ran.nextint (62));8 }9 TenStringBuilder rzm1=NewStringBuilder (); One for(inti=0;i) A { -Rzm1.append (A[i]);//Generate 4-bit authentication code