本文实例讲述了Yii2框架实现登陆添加验证码功能。分享给大家供大家参考，具体如下：

models中

LoginForm.php

public $verifyCode;public function rules(){ return [ …… ['verifyCode', 'captcha', 'on' => 'login'], //验证码 ];}public function scenarios() { $scenarios = parent::scenarios(); $scenarios['login'] = ['username', 'password', 'rememberMe', 'verifyCode']; return $scenarios;}

controller中

public function actions(){ return [ 'error' => [ 'class' => 'yii\web\ErrorAction', ], 'captcha' => [ 'class' => 'yii\captcha\CaptchaAction', 'fixedVerifyCode' => YII_ENV_TEST ? 'testme' : null, 'width' => 100, 'height' => 34, 'padding' => 0, 'minLength' => 4, 'maxLength' => 4, ], ];}public function actionLogin(){ if (!\Yii::$app->user->isGuest) { return $this->goHome(); } $model = new LoginForm(['scenario' => 'login']); if ($model->load(Yii::$app->request->post()) && $model->login()) { return $this->goBack(); } else { return $this->render('login', [ 'model' => $model, ]); }}

view中

<?phpuse yii\helpers\Html;use yii\bootstrap\ActiveForm;use yii\captcha\Captcha;?><?php $form = ActiveForm::begin(['id' => 'login-form']); ?><?= $form->field($model, 'verifyCode')->widget(Captcha::className(), [ 'template' => '<div class="input-group input-group-lg col-md-8"><span class="input-group-addon"><i class="glyphicon glyphicon-eye-open red"></i></span>{input}<div class="input-group-addon" style="padding:5px;">{image}</div></div>', 'options' => ['class' => 'form-control','placeholder'=>"验证码"], 'imageOptions'=>['alt'=>'点击换图','title'=>'点击换图', 'style'=>'cursor:pointer'] ])->label(false) ?><?php ActiveForm::end(); ?>

更多关于Yii相关内容感兴趣的读者可查看本站专题：《Yii框架入门及常用技巧总结》、《php优秀开发框架总结》、《smarty模板入门基础教程》、《php面向对象程序设计入门教程》、《php字符串(string)用法总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》

希望本文所述对大家基于Yii框架的PHP程序设计有所帮助。