控制器

 public function actionIndex()    {        $query = User::find();        //搜索        $searchModel = new UserSearch();        if(Yii::$app->request->isPost){
　　　　　　　　//获取post请求            $param = Yii::$app->request->post();            $query->andFilterWhere([                'id' => $param['id'],            ]);            $query->andFilterWhere(['like', 'username', $param['username']]);        }        $pages = new Pagination(['totalCount' =>$query->count()]);        //分页        $dataProvider = new ActiveDataProvider([            'query' => $query,            'pagination' => [                'pagesize' => '10'            ]        ]);        if(!$searchModel->validate()){            return  $dataProvider;        }        return $this->render('index', [            'dataProvider' => $dataProvider,            'pages' => $pages,            'model' => $searchModel,        ]);    }         

视图;方法一·表单

<form  method="post">     <p >         <label>ID</label>         <?= Html::input('text','id','',['class'=>'form-control','placeholder'=>'id']) ?>     </p>    <p >        <label>用户名</label>        <?= Html::input('text','username','',['class'=>'form-control','placeholder'=>'用户名']) ?>    </p>
　　　//Yii2表单提交默认需要验证CSRF,如果CSRF验证不通过,则表单提交失败    <input type="hidden" name="_csrf-模块名" value="<?= Yii::$app->request->csrfToken ?>" />    <?= Html::hiddenInput('r', '/user/index') ?>    <?= Html::submitButton('确定', ['class' => 'btn btn-primary']) ?></form>

方法二

<?= Html::beginForm('','post')?>
<p >      <label>ID</label>      <?= Html::input('text','id','',['class'=>'form-control','placeholder'=>'id']) ?></p><?= Html::hiddenInput('r', '/user/index') ?><?= Html::submitButton('确定', ['class' => 'btn btn-primary']) ?><?= Html::endForm() ?>