Yii2框架实现登陆添加验证码功能示例_php实例_

 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; } 

 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, ]); } } 

 'login-form']); ?>field($model, 'verifyCode')->widget(Captcha::className(), [ 'template' => '
{input}
{image}
', 'options' => ['class' => 'form-control','placeholder'=>"验证码"], 'imageOptions'=>['alt'=>'点击换图','title'=>'点击换图', 'style'=>'cursor:pointer'] ])->label(false) ?>