How to use Captcha verification code in Yii, yiicaptcha verification code_PHP tutorial

How Yii uses Captcha verification code, yiicaptcha verification code

The example in this article describes how Yii uses Captcha verification code. Share it with everyone for your reference, the details are as follows:

For detailed code, please refer to: Yii’s own sample code post project, which contains a contact form that uses a verification code.

1. Model:

Add the verification 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 be authenticated
   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 mapping action CCaptchaAction to the LoginController controller

public function actions()
{
 return array(
  // captcha action renders the CAPTCHA image displayed on the contact 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'];
//在此核对验证码
   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')->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
   {//提示错误
    $model->addError('verifyCode','验证码不对');
   }
  }
  // display the login form
  $this->render('/user/login',array('model'=>$model));
 } else
  $this->redirect(Yii::app()->controller->module->returnUrl);
}

Before verifying the username and password, check the verification code:

if($this->createAction('captcha')->validate($model->verifyCode, false))
{

3. view

Show the verification code image in the view and input box

<?php $this->widget('CCaptcha'); ?>
  <?php echo CHtml::activeTextField($model,'verifyCode',array('tabindex'=>1)); ?>
<img src="http://www.XXXX.net/uploads/123456.jpg" alt="">

I hope this article will be helpful to everyone’s PHP program design based on the Yii framework.

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