我正在用代码点火器制作一个在线考试系统。

Question

我正在开发一个代码点火器考试系统。我的数据库里有一张题为“问题”的表格，里面有7个问题，选项1，2，3，4，正确的答案和标签。我要去取和匹配结果。

我的视图编码是

​

<form action="<?php echo base_url() ?>main/economics_validation" name ="f" method="post" accept-charset="utf-8">
              <?php
              
              foreach($eco as $economics) 
                    {
                ?>
       <li>
            <h3><p>Q<?php echo $economics->id ?>  <?php echo $economics->question; ?></p></h3>
            <p><?php echo $economics->option1 ?>
            <input type="radio" name="<?php echo $economics->id ?>" value="<?php echo $economics->option1 ?>"></p>
            <p><?php echo $economics->option2 ?>
            <input type="radio" name="<?php echo $economics->id ?>" value="<?php echo $economics->option2 ?>"></p>
            <p><?php echo $economics->option3 ?>
            <input type="radio" name="<?php echo $economics->id ?>" value="<?php echo $economics->option3 ?>"></p>
            <p><?php echo $economics->option4 ?>
            <input type="radio" name="<?php echo $economics->id ?>" value="<?php echo $economics->option4 ?>"></p>
       </li>
        <?php 
                  }
        ?>
            
        
    </ul>
    </div>

​

我的控制器编码是

public function economics_validation()
    {
        $result['d']=$this->model_db->calculate_marks();
        $this->load->view('marks',$result);
    }

我的模型编码是

public function calculate_marks()
    {
        $query = $this->db->query("SELECT * FROM questions");
        $a = $query->result();
        $q2 = $this->db->get('questions');
        $marks = 0;

            foreach($a as $corr)
            {
                for($i = 1; $i <= $q2->num_rows();$i++)
                {
                    if($corr->correct_answer == $this->input->post($i))
                    {
                        $marks = $marks + 1;
                    }
                    else
                    {

                    }
                }

            }


        return $marks;
    }

我无法得到正确的结果。问题是它把错误的答案说成是正确的。

Answer 1

您的模型中的函数需要一些调整。试试这段代码。

public function calculate_marks()
    {
        $query = $this->db->query("SELECT * FROM questions");
        $a = $query->result();
        $marks = 0;

            foreach($a as $corr)
            {
                if($corr->correct_answer == $this->input->post($corr->id))
                {
                    $marks = $marks + 1;
                }

            }

        return $marks;
    }

就这样。