The method of using CAPTCHA verification code in Yii _php instance

This article illustrates the method used by Yii to use CAPTCHA authentication codes. Share to everyone for your reference, specific as follows:

Detailed code can refer to: Yii from the sample Code post project, which has a contact table alone to the verification code.

1. Model:

Add a validation code to an attribute of Userlogin:

Class Userlogin extends Cformmodel
{public
 $username;
 public $password;
 public $rememberMe;
 public $verifyCode;
 Public function rules ()
 {return
  array (
   ///username and password are required
   Array (' username, Password,verifycode ', ' required '),
   //RememberMe needs to be a Boolean
   array (' RememberMe ', ' Boolean '),
   Password needs to is authenticated
   array (' Password ', ' Authenticate '),
   //Verifycode needs to be entered Corre ctly
   Array (' Verifycode ', ' captcha ', ' AllowEmpty ' =>! Ccaptcha::checkrequirements ())
  ;
 }
 /**
  * Declares attribute labels.
  */Public
 function Attributelabels ()
 {return
  array ('
   rememberme ' =>yii::t (' user ', ' Remember Me next Time "),
   ' username ' =>yii::t (' user ', ' username or email '),
   ' Password ' =>yii::t (' user '," Password "),
   ' Verifycode ' =>yii::t (' user ', ' Verification Code '),
  );
 }

2. Controller

Add mapping actions to the Logincontroller controller ccaptchaaction

Public function actions () {return array (///CAPTCHA action renders the CAPTCHA image displayed on the contacts page 
   ' Captcha ' =>array (' class ' => ' ccaptchaaction ', ' BackColor ' =>0xf4f4f4, ' padding ' =>0, ' height ' =>30,
' MaxLength ' =>4,);
  } ublic function Actionlogin () {if (Yii::app ()->user->isguest) {$model =new userlogin;
   Collect user input data if (Isset ($_post[' userlogin ')) {$model->attributes=$_post[' userlogin '];//Check the verification code here if ($this->createaction (' Captcha ')->validate ($model->verifycode, False)) {//validate user input and Redi Rect to previous page if valid if ($model->validate ()) {//admin login only if (Yii::app ()->getmodule (' Us
    Er ')->isadmin () ==1) {$this->lastviset (); if (Strpos (Yii::app ()->user->returnurl, '/index.php ')!==false) $this->redirect (Yii::app ()->
    Controller->module->returnurl); else $this->redirect (Yii::app ()->user->returnurl);
    }else {//if No admin when login out $this->redirect (Yii::app ()->controller->module->logouturl);
   }}else {//Hint error $model->adderror (' Verifycode ', ' Verify code is not correct ');
 }//Display the login form $this->render ('/user/login ', Array (' model ' => $model));
else $this->redirect (Yii::app ()->controller->module->returnurl);

 }

Check the authentication code before verifying the username password:

if ($this->createaction (' Captcha ')->validate ($model->verifycode, false))
{

3. View

Display the validation code picture in the view, enter the box

<?php $this->widget (' Ccaptcha ');?>
  <?php Echo Chtml::activetextfield ($model, ' Verifycode ', Array (' TabIndex ' =>1);?> 

I hope this article will help you with the PHP program design based on the YII framework.