我为查询的每一行都设置了单选按钮。我不知道如何创建它们的名称，以便对查询的每一行都可以选中单选按钮。现在我只能选中所有单选按钮中的一个，但不仅仅是对每一行。我使用Codeigniter。这是我的观点：

?php
echo validation_errors();

foreach ($question as $row)
{
    echo form_open();
    echo "<tr><td>";
    echo "$row->question";
    echo "</td></tr>";
    echo "<tr><td>";
    
    $data=array(
        'name' => 'answer',
        'value' => '1'
    );
    
    echo form_radio($data);
     $data=array(
        'name' => 'answer',
        'value' => '2'
    );
    
    echo form_radio($data);
    $data=array(
        'name' => 'answer',
        'value' => '3'
    );
    
    echo form_radio($data);
    echo "</td></tr>";
    echo form_submit($data);

    echo form_close();

返回此结果的模型中的查询为：

public function survey_show() {
       
        $this->db->select('question_id, question');
        $this->db->from('questions');
        $result=$this->db->get();
            return $result->result();
    }

public function survey_fill() 
    {
        if (null !==($this->input->post('submit'))) {
          $date = new DateTime("now"); 
        
        $data = array(
            'user_id'=>$this->session->userdata['user_id'],
            'question_id'=>$this->input->post('question_id'),  
             'answer'=>$this->input->post('answer_1'),               
            'created_at'=>$date->format('Y-m-d H:i:s')
        );

        $this->db->insert('survey_answers', $data);