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018.CI4框架CodeIgniter数据库操作之：Delete删除一条数据

2024-03-31 数据库

01. 在Model中写数据库操作语句，代码如下：

<?php namespace AppModelsSystem;

use CodeIgniterModel;

class User_model extends Model
{
    var $Db;

    function __construct()
    {
        parent::__construct();
        //创建数据库连接
        $this->Db = ConfigDatabase::connect();
    }

    function deletedata()
    {
        $builder = $this->Db->table(‘tp_user‘)->where(‘ID‘, 160);
        $builder->delete();
    }
}

02.在CI4框架的控制器中调用数据库删除

<?php namespace AppControllers;

class Home extends BaseController
{
    //http://127.0.0.1/CI4/public/
    //http://127.0.0.1/CI4/public/index.php/home
    //http://127.0.0.1/CI4/public/index.php/home/insertdata

    var $User_Models;

    function __construct()
    {
        //创建数据库连接
        $this->User_Models = new AppModelsSystemUser_model();
    }

    public function index()
    {
        //调用我们的Lib库文件
        $Mylib = new AppLibrariesmylib();

        //赋值
        $Mylib->setAge(18);
        $Mylib->setName(‘张三‘);
        //输出
        echo $Mylib->getAge() . ‘<br>‘;
        echo $Mylib->getName() . ‘<br>‘;

        echo ‘青青子衿悠悠我心‘;
    }

    public function delete()
    {
        $rst = $this->User_Models->deletedata();
    }
}