我希望能够从数据库中删除问题/答案（选项）和主题Codeigniter删除记录

Question

[数据库：multi_login，表：测验字段：测验ID，问题，choice1，choice2，choice3，答案，主题]

我的测验完美无缺，我只想在测验页面中删除测验（这将在输入测验php页面之外完成），能够删除答案（choice1，choice2，choice3或answer）和问题（question）。

模型：

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class quizmodel extends CI_Model {

    public function getQuestions()
    {
        $this->db->select("quizID, question, choice1, choice2, choice3, answer, subject");
        $this->db->from("quiz");
        $this->db->where("subject",'computing');


        $query = $this->db->get();

        return $query->result();

        $num_data_returned = $query->num_rows;

        if ($num_data_returned < 1) {
          echo "There is no data in the database";
          exit();   
        }
    }
}

控制器：

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Questions extends CI_Controller {

    function __construct() {
        parent::__construct();
        $this->load->database();
    }

    public function quizdisplay()
    {

        $this->load->model('quizmodel');
        $this->data['questions'] = $this->quizmodel->getQuestions();
        $this->load->view('play_quiz', $this->data);

    }

        public function resultdisplay()
    {
        $this->data['checks'] = array(
             'ques1' => $this->input->post('quizid1'),
             'ques2' => $this->input->post('quizid2'),
             'ques3' => $this->input->post('quizid3'),
             'ques4' => $this->input->post('quizid4'),
             'ques5' => $this->input->post('quizid5'),
             'ques6' => $this->input->post('quizid6'),
             'ques7' => $this->input->post('quizid7'),
             'ques8' => $this->input->post('quizid8'),
             'ques9' => $this->input->post('quizid9'),
             'ques10' => $this->input->post('quizid10'),
        );

        $this->load->model('quizmodel');
        $this->data['results'] = $this->quizmodel->getQuestions();
        $this->load->view('result_display', $this->data);
    }
}

玩测验的视图：

    <div id="container">
    <h1>Play the Computing Quiz!</h1>

    <form method="post" action="<?php echo base_url();?>index.php/Questions/resultdisplay">


    <?php foreach($questions as $row) { ?>

    <?php $ans_array = array($row->choice1, $row->choice2, $row->choice3, $row->answer);
    shuffle($ans_array); ?>

    <p><?=$row->question?></p>

    <input type="radio" name="quizid<?=$row->quizID?>" value="<?=$ans_array[0]?>" required> <?=$ans_array[0]?><br>
    <input type="radio" name="quizid<?=$row->quizID?>" value="<?=$ans_array[1]?>"> <?=$ans_array[1]?><br>
    <input type="radio" name="quizid<?=$row->quizID?>" value="<?=$ans_array[2]?>"> <?=$ans_array[2]?><br>
    <input type="radio" name="quizid<?=$row->quizID?>" value="<?=$ans_array[3]?>"> <?=$ans_array[3]?><br>

    <?php } ?>

    <br><br>
    <input type="submit" value="Submit!">

    </form>

</div><div id="container">
    <h1>Play the Computing Quiz!</h1>

    <form method="post" action="<?php echo base_url();?>index.php/Questions/resultdisplay">


    <?php foreach($questions as $row) { ?>

    <?php $ans_array = array($row->choice1, $row->choice2, $row->choice3, $row->answer);
    shuffle($ans_array); ?>

    <p><?=$row->question?></p>

    <input type="radio" name="quizid<?=$row->quizID?>" value="<?=$ans_array[0]?>" required> <?=$ans_array[0]?><br>
    <input type="radio" name="quizid<?=$row->quizID?>" value="<?=$ans_array[1]?>"> <?=$ans_array[1]?><br>
    <input type="radio" name="quizid<?=$row->quizID?>" value="<?=$ans_array[2]?>"> <?=$ans_array[2]?><br>
    <input type="radio" name="quizid<?=$row->quizID?>" value="<?=$ans_array[3]?>"> <?=$ans_array[3]?><br>

    <?php } ?>

    <br><br>
    <input type="submit" value="Submit!">

    </form>

</div>

请帮忙！

Answer 1

在你的模型中：

function deleteQuiz($quiz_id)
{
   $this->load->database();
   $this->db->where('QuizID',$quiz_id);
   $this->db->delete('multi_login.quiz');
}

如果要删除测验，请从控制器中调用

$this->quizmodel->deleteQuiz($quiz_id);

整个测验（所有问题）将消失

Answer 2

尝试这个。 我希望它会对你有所帮助。

在控制器中创建一个删除功能，如果需要，可以在按钮单击时调用该功能。

function deleteQuiz($id){
$this->model_name->delete_quiz_by_id($id);
}

/模型

function delete_quiz($id){
return $this->db->where('quiz_id',$id)->delete('table_name');
}