表格输入值未在会话中保留

时间:2016-06-16 12:10:16

标签: php codeigniter

我正在开发这个codeigniter项目。我正在显示一些问题,我想使用分页来批量显示问题。首次加载时一切正常(我的意思是在第一页)但是当我导航到下一页时,它无法正常工作。所以我意识到表单输入值不会保留在后续页面上,所以我决定使用session来保存这些表单值,但它仍然没有被保留。我的控制器:

public function displayQuestions()
{
    $sessData = [
        'classLevel' => $this->input->post('class_level'),
        'subject'   => $this->input->post('subject')
    ];

    $this->session->set_userdata($sessData);

    $config = array();

    $page = (($this->uri->segment(3)) ? $this->uri->segment(3) : 0);

    $config["base_url"]     = base_url().'questions/displayQuestions';
    $config["total_rows"]   = 20;
    $config["per_page"]     = 5;
    $config["uri_segment"]  = 3;

    $this->pagination->initialize($config);
    $data["links"] = $this->pagination->create_links();

    // print_r($this->session->classLevel); exit;

    $data['questions'] = $this->questions_model->selectQuestions($this->session->classLevel, $this->session->subject, $config["per_page"], $page);

    // $this->load->view('layouts/header');
    $this->load->view('users/questions', $data);
    // $this->load->view('layouts/sidebar');
    // $this->load->view('layouts/footer');
}

注意:我使用表单输入值来查询数据库以显示问题。我的模特:

public function selectQuestions($classLevel, $subject, $limit, $start)
{
    $questions = $this->db->where('class_level', $classLevel)
                    ->where('subj_code', $subject)
                    // ->order_by('id', 'RANDOM')
                    ->limit($limit, $start)
                    ->get('questions');
    // $questions = $this->db->limit($limit, $start)
    //              ->get('questions');

    if ($questions->num_rows() > 0) {
        return $questions->result_array();
        // print_r($questions->result_array());
    }

    return false;
}

1 个答案:

答案 0 :(得分:1)

当您导航到下一页(不包含任何POST数据)时,我猜您正在清除全部或部分会话数据。尝试更改部分

$sessData = [
    'classLevel' => $this->input->post('class_level'),
    'subject'   => $this->input->post('subject')
];
$this->session->set_userdata($sessData);

要:

if ($this->input->post('class_level') && $this->input->post('subject')):
    $sessData = [
        'classLevel' => $this->input->post('class_level'),
        'subject'   => $this->input->post('subject')
    ];
    $this->session->set_userdata($sessData);
endif;

意味着您只在先前发布数据时才设置会话。