Yii2框架实现登陆添加验证码功能示例


            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





<?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(); ?>







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