Python crawler entry (4)-Verification Code Part 1 (mainly about verification code verification process, excluding Verification Code cracking), python part 1
This article describes the
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(' A ', ' Z '),Range(0, 9))); }; $row=Str_shu
User registration function: Enter the verification code and click "null" to automatically check whether the entered verification code is correct. If the verification code is correct, a green check box is displayed behind the
The example of this article for everyone to share the code of PHP generated verification codes, for your reference, the specific content as follows
The above is the whole content of this article, I hope that you learn PHP programming help.
The above describes the PHP generated cool four character verification code
image.func.php
The above describes the PHP implementation to generate verification code instance sharing, including PHP, verification code aspects of the content, I hope that the PHP tutorial interested in a friend helpful.
PHP generates a variety of common verification code and AJAX verification process, PHP Verification code AJAX Verification
Verification codes are important in Web applications and are
The example of this article describes the Zend Framework to generate the verification code and implement the Verification code verification function method. Share to everyone for your reference, specific as follows:
Today, how to implement the function of the
Php implements the Chinese character verification code and formula verification code. Php implements the Chinese character verification code and the formula verification
PHPWind9.0 manually blocks the verification code to solve the problem of disabling the verification code in the background but still displaying it. phpwind9.0 Verification Code
Recently, a product was designed and requires POST lo
PHP implementation of Chinese character verification Code and Formula verification code method, PHP Chinese character Verification Code calculation
This paper introduces the method of implementing Chinese character
A dynamic random verification code can be generated in just a few steps, with the final effect such as:650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/74/D9/wKioL1YscJvQIeqDAAF7uMWlQBA873.jpg "title=" Cheetah 20151025140145.png "alt=" Wkiol1yscjvqieqdaaf7umwlqba873.jpg "/>One front desk Display page login.jspWhere the verification
Zend Framework generates a verification code and implements the verification code verification function (with the demo source code download), zenddemo
This example describes how Zend Framework generates a
The implementation principle of PHP verification code is comprehensively parsed. A small case of php verification code is provided to parse the verification code comprehensively.
Expansion
We need to enable gd expansion. You can u
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 code This piece is comp
This article mainly introduces ZendFramework's function of generating a verification code and verifying the verification code. A more detailed analysis shows the specific steps and related skills for ZendFramework to implement an operation verification
12306 website launched the "Color dynamic verification Code mechanism", the new version of the verification code not only often appear characters stacked pressure, but also constantly jitter, many people's Congress called "See not clear," said the verification
PHP implementation of digital verification code and digital operation verification Code, PHP digital Verification code operation
In this paper, the digital Verification
This article brings the content is about the PHP implementation to generate mixed verification code and image Verification code and test (code), there is a certain reference value, the need for friends can refer to, I hope to help you.
Generate a hybrid
Php-based digital verification code and digital operation verification code, and php-based digital verification code operation
This article describes the php-implemented digital verification
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