How do I generate a captcha picture? Using the PHP gd? Ok,right. In fact, Zend's CAPTCHA module has been packaged well. This article explains how to use the Zend Captcha module.
Environment installationFirst Zend The captcha need to install GD. See
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
ProblemIn a less fortunate situation, people use automated programs to submit forms, causing a lot of rubbish throughout the internet. One way to prevent this is to use a CAPTCHA---CAPTCHA: fully automated to differentiate between computer and human
PHP implementation of CAPTCHA Verification code class instance, CAPTCHA verification code
This paper describes the PHP implementation of the CAPTCHA verification code class, in the PHP program design has a very wide range of applications. Share to
PHP code for simple Verification Code identification, PHP CAPTCHA codes
Always wanted to write this, after a long time today interest came to simply record.
Verification Code
Fully automatic distinguish between computer and human public Turing Test
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),
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
• 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 =
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