将数据写入yii2中的db

return [
    'class' => 'yii\db\Connection',
    'dsn' => 'mysql:host=localhost;dbname=mydatabase',
    'username' => 'myusername',
    'password' => 'mypassword',
    'charset' => 'utf8',
];

namespace app\models;

use yii\db\ActiveRecord;

class User extends ActiveRecord
{
    public static function tableName()
    {
        return 'user';
    }

    // 定义属性和关联关系等
}

$user = new User();
$user->username = 'john';
$user->email = 'john@example.com';
$user->save();

$user = User::findOne(['username' => 'john']);
if ($user !== null) {
    $user->username = 'jane';
    $user->save();
}

$user = User::findOne(['username' => 'jane']);
if ($user !== null) {
    $user->delete();
}