thinkphp5 - thinkPHP Please tell me how to do this, with the code attached!

This is the html part:

<code><form name="name" action="http://localhost/yb1/Home/curd/create" method="post">
    <input type="text" name="学号" value="1446298514" id='xh'>
    <input type="submit" name='tj' value="提交">
</form></code>

This is creat:

<code>    public function create()
    {

        $use = D('classone');
        $use->create();
        $use->add();

        //上面这些代码,也可能执行失败,执行成功,就执行下面★,执行失败,就执行◆,请问这个怎么写?
        
        //★$this->success('插入成功', 'lastRow',2);
        //◆$this->page();

    }</code>

Reply content:

This is the html part:

<code><form name="name" action="http://localhost/yb1/Home/curd/create" method="post">
    <input type="text" name="学号" value="1446298514" id='xh'>
    <input type="submit" name='tj' value="提交">
</form></code>

This is creat:

<code>    public function create()
    {

        $use = D('classone');
        $use->create();
        $use->add();

        //上面这些代码,也可能执行失败,执行成功,就执行下面★,执行失败,就执行◆,请问这个怎么写?
        
        //★$this->success('插入成功', 'lastRow',2);
        //◆$this->page();

    }</code>

<code>public function create()
    {

        $use = D('classone');
        if($use->create()){
            if($use->add()){
                $this->success('插入成功', 'lastRow',2);
                
            }else{
                $this->error("插入失败！");
            }
        }else{
            $this->error($use->getError())
        }
    }</code>

First determine whether create is successful. If it fails, return immediately. Then determine whether add is successful. Successfully execute the following. If it fails, give an error message

<code>public function create()
    {

        $use = D('classone');
        $use->create();
        $res=$use->add();
           
        if($res){
            $this->success('插入成功', 'lastRow',2);
        }
        else {
            $this->page();
        }

    }</code>