use frontend\models\StudUser;
use yii\data\Pagination;
use yii\db\Query;
/**
 * 查詢
 *
 */
public function actionSearch()
{
  //接值
  $where=Yii::$app->request->get();
  //實(shí)例化query
  $query=new Query();
  $query->from('stud_user');
  //判斷
  if(isset($where['sex'])&&$where['sex']!=''){
    //判斷
    if($where['sex']=='男'){
      $query->andWhere(['stud_sex'=>0]);
    }
    if($where['sex']=='女'){
      $query->andWhere(['stud_sex'=>1]);
    }
  }else{
 $where['sex']='';
}
  //年齡
  if(isset($where['age'])&&$where['age']!=''){
     $query->andWhere(['>','stud_age',$where['age']]);
  }else{
$where['age']='';
}
  //分頁
  $pagination = new Pagination(['totalCount' => $query->count()]);
  //條數(shù)
  $pagination->setPageSize('3');
  //條件
  $query->offset($pagination->offset)->limit($pagination->limit);
  //執(zhí)行
  $userInfo=$query->all();
  //print_r($userInfo);die;
  return $this->render('search',['userInfo'=>$userInfo,'page'=>$pagination,'where'=>$where]);
}

<?php
namespace frontend\models;
use Yii;
use yii\db\ActiveRecord;
class StudUser extends ActiveRecord
{
  /**
   * 聲明表名
   *
   */
   public static function tableName()
   {
     return '{{%stud_user}}';
   }
  /**
   * 驗(yàn)證規(guī)則
   *
   */
  public function rules()
  {
    return [
      ['stud_age','integer'],
    ];
  }
}

<?php
use yii\widgets\ActiveForm;
use yii\helpers\Url;
use yii\helpers\Html;
use yii\widgets\LinkPager;
?>
<?php
$form=ActiveForm::begin([
  'action'=>Url::toRoute(['admin/search']),
  'method'=>'get',
]);
echo '性別',"&nbsp",Html::input('text','sex',$where['sex']);
echo '年齡',"&nbsp",Html::input('text','age',$where['age']);
echo Html::submitButton('提交');
ActiveForm::end();
?>
<table class="table">
<tr>
  <td>序號</td>
  <td>姓名</td>
  <td>年齡</td>
</tr>
  <?php foreach($userInfo as $val):?>
    <tr>
      <td><?= $val['stud_id']?></td>
      <td><?= $val['stud_name']?></td>
      <td><?= $val['stud_age']?></td>
    </tr>
  <?php endforeach;?>
</table>
<?php
echo LinkPager::widget([
  'pagination' => $page,
  'nextPageLabel'=>'下一頁'
 ]);?>