Yii2登陆添加验证码

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

<?php

use 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(); ?>