yii框架 AR增删改查 分页

<?php
// header("content-type:text/html;charset=utf-8");
/* @var $this yii\web\View */

$this->title = "yii增删改查";
?><center>
<form action="?r=curd/add" method="post">
<!--        <input type="hidden" value="TSol1G2RuGP9heKFYtHazIxVwBHD9UA-k2tGhck-sN_15tbNHcHRsbAzKnUk0g_zqAd6Bq9hFhyZ-u6pVwvS4w==" name="_csrf">-->
<table>
<tr>
<td>用户名</td>
<td><input type="text" name="username"></td>
</tr>
<tr>
<td><input type="submit" value="添加"></td>
</tr>
</table>
</form>
</center>

show.php

<?phpuse yii\helpers\Html;use yii\widgets\LinkPager;?><center><table border="1"><th>id</th><th>用户名</th><th>操作</th><?php foreach ($data as $v): ?><tr><td><?= Html::encode("{$v->id}") ?></td><td><?= Html::encode("{$v->username}") ?></td><td><a href="?r=curd/del&id=<?= Html::encode("{$v->id}") ?>">删除</a>||<a href="?r=curd/find&id=<?= Html::encode("{$v->id}") ?>">修改</a></td></tr><?php endforeach; ?></table><?= LinkPager::widget(['pagination' => $pagination]) ?></center>

<?php/* @var $this yii\web\View */use yii\helpers\Html;$this->title = "yii修改";?><center><form action="?r=curd/update" method="post"><table><input type="hidden" name="id" value="<?= Html::encode("{$data->id}") ?>"><tr><td>用户名</td><td><input type="text" name="username" value="<?= Html::encode("{$data->username}") ?>"></td></tr><tr><td><input type="submit" value="修改"></td></tr></table></form></center>

models

<?phpnamespace app\models;use yii\db\ActiveRecord;use yii\base\Model;class User_1 extends ActiveRecord{}

<?phpnamespace app\controllers;use app\models\User_1;use Yii;use yii\data\Pagination;// use yii\filters\AccessControl;use yii\web\Controller;use yii\web\Response;// use yii\filters\VerbFilter;// use app\models\LoginForm;// use app\models\ContactForm;class  CurdController extends Controller{public function actionIndex(){return $this->render('index');}//添加public function actionAdd(){//        $admin = new User_1();//        $username=$_POST['username'];//        $admin->username = $username;//        if($admin->save() > 0){ echo "添加成功"; }else{ echo "添加失败"; }$model=new User_1();$request = Yii::$app->request;if ($request->isPost){$post=$request->post();$model->username=$post['username'];$model->save();}echo '<script>alert("添加成功");location.href="?r=curd/select"</script>';}//查询public function actionSelect(){$query = User_1::find();$pagination = new Pagination(['defaultPageSize' => 5,'totalCount' => $query->count(),]);$countries = $query->offset($pagination->offset)->limit($pagination->limit)->all();return $this->render('show', ['data' => $countries,'pagination' => $pagination,]);//        $model=new User_1();//        $data=$model->find()->all();//        return $this->render('show',['data'=>$data]);}//删除public function actionDel(){$request = Yii::$app->request;$id=$request->get("id");$data=User_1::findOne($id)->delete();if($data){echo '<script>alert("删除成功");location.href="?r=curd/select"</script>';}else{echo '<script>alert("删除失败");location.href="?r=curd/select"</script>';}}//查询一条public function actionFind(){$request = Yii::$app->request;$id=$request->get("id");$model=new User_1();$data=$model->find()->where("id=$id")->one();return $this->render('update',['data'=>$data]);}public function actionUpdate(){$request = Yii::$app->request;$id=$request->post("id");$model=new User_1();$model=$model->findOne($id);$post=$request->post();$model->username=$post['username'];$res=$model->save();if($res){echo '<script>alert("修改成功");location.href="?r=curd/select"</script>';}else{echo '<script>alert("修改失败");location.href="?r=curd/find"</script>';}}}