The method of using CAPTCHA verification code for Yii _php instance

In this paper, the method of using CAPTCHA verification code for Yii is described. Share to everyone for your reference, as follows:

The detailed code can refer to: the example code of YII comes with The Post project, which has a contact form with the verification code.

1. Model:

Add a verification code to a property of Userlogin:

Class Userlogin extends cformmodel{public $username, public $password, public $rememberMe, public $verifyCode; Ction rules () {  return Array (   //username and password are required   Array (' username, Password,verifycode ', ' Required '),   //RememberMe needs to is a Boolean   array (' RememberMe ', ' Boolean '),   //password needs to be Authen ticated   Array (' Password ', ' Authenticate '),   //Verifycode needs to be entered correctly   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 a mapping action to the Logincontroller controller ccaptchaaction

Public function actions () {return array (//CAPTCHA action renders the CAPTCHA image displayed on the contact page ' Capt Cha ' =>array (' class ' = ' ccaptchaaction ', ' BackColor ' =>0xf4f4f4, ' padding ' =>0, ' height ' =>30, ' maxle Ngth ' =>4,),);}  ublic function Actionlogin () {if (Yii::app ()->user->isguest) {$model =new userlogin; Collect user input data if (Isset ($_post[' userlogin ')) {$model->attributes=$_post[' userlogin '];//in this verification code if ($  This->createaction (' Captcha ')->validate ($model->verifycode, False)) {//validate user input and redirect to Previous page if valid if ($model->validate ()) {//admin login only if (Yii::app ()->getmodule (' user ')->i    Sadmin () ==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 {//Prompt error $model->adderror (' Verifycode ', ' captcha incorrect '); }}//Display the login form $this->render ('/user/login ', Array (' model ' = $model)); } else $this->redirect (Yii::app ()->controller->module->returnurl);}

Before verifying the user name password, check the verification code:

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

3. View

Display the Captcha picture in the view, enter the box

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

It is hoped that this article is helpful to the PHP program design based on YII framework.

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