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Phprequire_once' String.func.php ';//Verify code via GD library/** * Add validation text * @param int $type * @param int $length*/functionBuildrandomstring ($type=1,$length=4){ $row=''; if($type==1){ $row=Join('',Range(0, 9)); }Elseif($type==2){ $row=Join('',Array_merge(Range(' A ', ' Z '),Range(' A ', ' Z '))); }Elseif($type==3){ $row=Join('',Array_merge(Range(' A ', ' Z '),Range('
", "No-cache");// Write the picture to the browser imageio.write (bufferedimage, "JPG", response.getoutputstream ());} /*** Set Picture background color **/privatevoidsetbackground (graphicsgraphics) { Graphics.setcolor (Color.White); Graphics.fillrect (0,0,width,height);} /*** Set picture Border **/privatevoidsetbordor (graphicsgraphics) { Graphics.setcolor (Color.Blue); Graphics.drawrect (1,1,width-2,height-2 );} /*** on the picture to draw the **/privatevoiddrawrandomline (Graphicsgraphics,co
Author: White Wolf Source: Http://www.manks.top/article/yii2_captcha This article copyright belongs to the author, welcome reprint, but without the author consent must retain this paragraph statement, and in the article page obvious location gives the original text connection, otherwise reserves the right to pursue legal responsibility. Would have thought YII2 framework verification
SMS Verification CodeSMS Verification code is to call some interface to send SMS, SMS verification code in the login, registration and other operations to use the most extensive, this section of this article demonstrates how to use Java to make a simple SMS
Background: Said before the project, lazy login module did not add verification code, think of or add, find the next TP document, found that there is integration, special record.First, instantiate the class that generated the verification code (this method is easy to access in Indexcontroller)[PHP] View plaincopy /
The recently made micro-letterhead page encountered a page that had not been encountered before, just started to put in there did not write, but when the other pages are written well, still have to go back to study the page problem, just at the beginning I consulted the company's mobile research and development, from his inspiration, finally achieved this effect, Let's show you the effect chart first. Effect Chart: Input Verification
12306 Train ticket booking site verification code has been a big problem for everyone, the number + letter verification code is too simple to automatically identify the verification code of the train ticket ticket software abuse,
Verification Code Generation Program I do not introduce here, you can refer to http://www.111cn.net/phper/phpanqn/46698.htm below to introduce a simple The code is as follows Copy Code Session_Start ();Settings: You can modify the parameters of the veri
Thinkphp implements text message verification and registration, and thinkphp text message Preface Text message verification codes are often used during registration. This article records the ideas and implementation. The text mess
Title Document HTML PUBLIC "-//w3c//dtd XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" > xmlns= "http://www.w3.org/1999/xhtml" > http-equiv= "Content-type" content= "text/html; Charset=utf-8 "/> Id= "Form1" Name= "Form1" method= "Post" action= "checkcode.php" > For= "Code" > Verification Code:Type= "
Using the TP framework to write a landing interface, originally can display the verification code picture, but after the project has been transplanted, can not display the verification code picture, only display a white box, there is no verification
. Second, it seems not easy. In fact, we will carefully study the rules, the background color and interferon, no matter how they change, verify that the characters are regular and the colors are the same, so it is very easy to exclude interferon, exclude all non-character pigments. Third, it seems more complex. the color of the verification character is also changing, and the color of each character is also different, except that the background co
recognized in seconds Function analysis: ① Imageline (); Imageline-draw a line segment bool imageline ( resource $image , int $x1 , int $y1 , int $x2 , int $y2 , int $color ) Imageline () uses color to draw a line segment from the coordinates x1, y1 to x2, y2 (0 in the upper left corner of the image. Imageline ($ img, mt_rand (0,150), mt_rand (0,150), mt_rand (), mt_rand (), $ linecolor); this indicates that the canvas $ img is from the coordinate x1, y1 to x2, y2 random ② Imagesetpixel (); I
background color and interferon has been changing, the verification of the color of the character is also changing, and the color of each character is different. Fourth, in addition to the third picture mentioned in the characteristics, but also in the text added two linear interference rate, seemingly difficult actually, it is easy to remove. Verification
ThinkPHP opens the verification code page to display the solution for garbled text, thinkphp verification code. ThinkPHP opens the verification code page to display the solution to garb
The Authentication code is to prevent the machine from flooding to the website pollution and increase the server burden to appear. At present, large and small sites have verification code. Today, I implemented a simple authentication code class. Simply because there is no interference in the arc and so on, but the
;heigh); } 3.3 4 characters are randomly selected from the random factor as the $ code verification code. // Generate random code private function createCode () {$ _ len = strlen ($ this-> charset)-1; for ($ I = 0; $ I 3.4 generate the verification
How does ASP. NET make a simple verification code? asp.net makes the verification code. If you want to do the verification code, you have to mention the GDI + plot. We all know that the verifi
The role of the CAPTCHA:1, to prevent advertising machine registration and posting, comments.2, to prevent brute force password, especially the password with administrator privileges.Here is a very useful verification code generation tool: KaptchaThis tool can generate various styles of verification code, because it is
in dozens of tests. Websites with simple verification Codes Import namespace: system. text; byte [] B = new byte [100]; random r = new random (); int code; the four-digit for (int I = 0Question about simple verification code by pressing the key genie Even a simple
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