//控制器
<?php

namespace  frontend\controllers;

use frontend\models\User;

use yii;

use yii\web\Controller;

class ContController extends Controller

{

    public $enableCsrfValidation = false;

    //用户注册

    public function actionUser()

    {

        //接收json数据

        $a=file_get_contents("php://input");

        $aa=json_decode($a,true);

        $last=User::add($aa);

        if($last)

        {

            return "添加成功";

        }

        else

        {

            return "添加失败";

        }

    }

}

//模型层

<?php

namespace frontend\models;

use yii;

use yii\base\Model;

class User extends Model

{

    //用户添加

    public static function add(array &$data)

    {

      //  return $data['name'];

        $a=Yii::$app->db->createCommand()->insert('user', [

            'name' => $data['name'],

            'age' => $data['age'],

            'se' => $data['se'],

            'email' => $data['email'],

            'tell' => $data['tell'],

            'pwd' => $data['pwd'],

        ])->execute();

        if($a)

        {

            return true;

        }else{

            return false;

        }

    }

}