captcha validation in php

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

How do I generate a captcha picture? Using PHP's GD? Ok,right. In fact, Zend's CAPTCHA module has been encapsulated. This article is about how to use the Zend Captcha module. Environment installationFirst Zend Captcha need to install GD. Check to

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

Captcha (automatic distinction between computer and human Turing Test-completely Automated public Turing test to tell Computers and humans Apart, abbreviated as Captcha) commonly known as CAPTCHA, is a public automatic program that distinguishes

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

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

The validation that is involved in this example is: User name: Length, character verification, repetitive Ajax validation (whether it already exists). Password: Length verification, repeat input password verification. Mail: Email address

• 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 =

This article mainly introduced the YII2 framework data validation operation, combined with the case form detailed analysis the YII framework common data validation operation principle, the realization method and the related operation skill, the need