Discover how to create captcha in php, include the articles, news, trends, analysis and practical advice about how to create captcha in php on alibabacloud.com
Verification code is often used for landing pages, message pages, registration page, the principle of verification code is very simple: the use of GD library to create a picture, of course, the image must add the necessary interference code, and
After groping, finally can apply the verification code in Laravel 5.1.Because the English slag five levels, so almost no search for anything useful, so consider on GitHub search verification Code pack!Note: The package on GitHub often has
1, installation
We install the Captcha expansion pack via Composer:
Composer require Mews/captcha
Note: Using this expansion pack in Windows also requires the installation of the GD2 extension (php.ini to cancel Php_gd2.dll in the previous
Example of the CI framework verification code CAPTCHA auxiliary function usage, cicaptcha. Examples of CI framework verification code CAPTCHA auxiliary function usage. This document describes the use of the CI framework verification code CAPTCHA
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),
Yii built-in Captcha basically can meet most requirements, if you have special requirements for verification code, you can customize the CAPTCHA, which is mainly through the extension of ccaptchaaction to achieve, this example to customize a
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
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
• 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 =
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.