CREATE TABLE `user` (
  `id` int(5) NOT NULL AUTO_INCREMENT,
  `username` varchar(15) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL,
  `password` varchar(999) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=63 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;

Route::get(‘demo‘,‘DemoController@demo‘);

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class User extends Model
{
    //
    protected $table=‘user‘;//对应表名
   protected $fillable=[‘id‘,‘username‘,‘password‘];//创建数据库对应字段
   public $timestamps=false;//禁用时间戳
}

<?php

namespace App\Http\Controllers;

use App\Models\User;

class DemoController extends Controller
{
    //
    public function demo()
    {
        $data = new User();//实例化模型
        $data->username = ‘胡歌‘;//给名称字段赋值
        $data->password = md5(‘222‘);//给密码字段赋值
        $data->save();//保存信息
    }
}

$data=User::find(‘3‘);//直接查询id
        $data->username = ‘ss‘;
        $data->password = md5(‘222‘);
        $data->save();//使用save（）方法自动维护