Yii使用Captcha验证码的方法
本文实例讲述了Yii使用Captcha验证码的方法。分享给大家供大家参考，具体如下：
详细代码可参考:yii自带的示例代码post项目，里面有一个contact表单用到了验证码.
1.Model:
将验证码加入UserLogin的一个属性:
classUserLoginextendsCFormModel
{
public$username;
public$password;
public$rememberMe;
public$verifyCode;
publicfunctionrules()
{
returnarray(
//usernameandpasswordarerequired
array('username,password,verifyCode','required'),
//rememberMeneedstobeaboolean
array('rememberMe','boolean'),
//passwordneedstobeauthenticated
array('password','authenticate'),
//verifyCodeneedstobeenteredcorrectly
array('verifyCode','captcha','allowEmpty'=>!CCaptcha::checkRequirements()),
);
}
/**
*Declaresattributelabels.
*/
publicfunctionattributeLabels()
{
returnarray(
'rememberMe'=>Yii::t('user',"Remembermenexttime"),
'username'=>Yii::t('user',"usernameoremail"),
'password'=>Yii::t('user',"password"),
'verifyCode'=>Yii::t('user','VerificationCode'),
);
}
}
2.Controller
在LoginController控制器加入映射动作CCaptchaAction
publicfunctionactions()
{
returnarray(
//captchaactionrenderstheCAPTCHAimagedisplayedonthecontactpage
'captcha'=>array(
'class'=>'CCaptchaAction',
'backColor'=>0xf4f4f4,
'padding'=>0,
'height'=>30,
'maxLength'=>4,
),
);
}
ublicfunctionactionLogin()
{
if(Yii::app()->user->isGuest){
$model=newUserLogin;
//collectuserinputdata
if(isset($_POST['UserLogin']))
{
$model->attributes=$_POST['UserLogin'];
//在此核对验证码
if($this->createAction('captcha')->validate($model->verifyCode,false))
{
//validateuserinputandredirecttopreviouspageifvalid
if($model->validate()){
//adminloginonly
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
{//ifnoadminwhenloginout
$this->redirect(Yii::app()->controller->module->logoutUrl);
}
}
}else
{//提示错误
$model->addError('verifyCode','验证码不对');
}
}
//displaytheloginform
$this->render('/user/login',array('model'=>$model));
}else
$this->redirect(Yii::app()->controller->module->returnUrl);
}
在验证用户名密码前，检查验证码：
if($this->createAction('captcha')->validate($model->verifyCode,false))
{
3.view
在视图中显示验证码图片,输入框
<?php$this->widget('CCaptcha');?>
<?phpechoCHtml::activeTextField($model,'verifyCode',array('tabindex'=>1));?>
<imgsrc="http://www.XXXX.net/uploads/123456.jpg"alt="">
希望本文所述对大家基于Yii框架的PHP程序设计有所帮助。