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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希望本文所述对大家基于yii框架的php程序设计有所帮助。