當我刷新頁面時，它會自動將值輸入到數據庫Codeigniter

Question

我創建了一個使用codeigniter。 當用戶第一次進入表單頁面時，用戶然后提交值，然后將值存儲到數據庫中，並再次將用戶定向到表單頁面。 現在問題是如果用戶在第一次提交表單后刷新頁面，最后插入的值會一次又一次地自動添加到數據庫中，因為用戶刷新頁面如何停止這個???

這是我的查看代碼...

        <?php echo form_open("site/upload_data"); ?>

            <div id="container" style="float:left; width:561px; height:50px">
                <div id="name" style="float:left; width:150px;">
                    Movie Name:
                </div>

                <div id="field" style="float:left; width:411px;">
                    <input type="text" name="movie_name" />
                </div>
            </div>


            <div id="container" style="float:left; width:561px; height:50px">
                <div id="name" style="float:left; width:150px;">
                    Release Date:
                </div>

                <div id="field" style="float:left; width:411px;">
                    <input type="text" name="date" />
                </div>
            </div>



            <div id="container" style="float:left; width:561px; height:160px">
                <div id="name" style="float:left; width:150px;">
                    Genres:
                </div>

                <div id="field" style="float:left; width:411px;">
                    <input type="checkbox" name="genres" value="Action">Action&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                    <input type="checkbox" name="genres" value="Adventure">Adventure&nbsp;&nbsp;&nbsp;
                    <input type="checkbox" name="genres" value="Animation">Animation&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                    <input type="checkbox" name="genres" value="Biography">Biography<br />

                    <input type="checkbox" name="genres" value="Comedy">Comedy&nbsp;&nbsp;&nbsp;
                    <input type="checkbox" name="genres" value="Crime">Crime&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                    <input type="checkbox" name="genres" value="Documentary">Documentary&nbsp;&nbsp;&nbsp;
                    <input type="checkbox" name="genres" value="Drama">Drama<br />

                    <input type="checkbox" name="genres" value="Family">Family&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                    <input type="checkbox" name="genres" value="Fantasy">Fantasy&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                    <input type="checkbox" name="genres" value="Film-Noir">Film-Noir&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                    <input type="checkbox" name="genres" value="Game-Show">Game-Show<br />

                    <input type="checkbox" name="genres" value="History">History&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                    <input type="checkbox" name="genres" value="Horror">Horror &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                    <input type="checkbox" name="genres" value="Music">Music&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                    <input type="checkbox" name="genres" value="Musical">Musical<br />


                    <input type="checkbox" name="genres" value="Mystery">Mystery&nbsp;&nbsp;&nbsp;&nbsp;
                    <input type="checkbox" name="genres" value="News">News&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                    <input type="checkbox" name="genres" value="Reality-TV">Reality-TV&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                     <input type="checkbox" name="genres" value="Romance">Romance<br />



                    <input type="checkbox" name="genres" value="Sci-Fi">Sci-Fi&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                    <input type="checkbox" name="genres" value="Sport">Sport&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                    <input type="checkbox" name="genres" value="Talk-Show">Talk-Show&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                    <input type="checkbox" name="genres" value="Thriller">Thriller<br />

                    <input type="checkbox" name="genres" value="War">War&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                    <input type="checkbox" name="genres" value="Western">Western


                </div>
            </div>


            <div id="container" style="float:left; width:561px; height:50px">
                <div id="name" style="float:left; width:150px;">
                    Rating:
                </div>

                <div id="field" style="float:left; width:411px;">

<input id="ttcontact" type="radio" checked="checked" value="G" name="rating">
G

<input id="ttcontact" type="radio" value="PG" name="rating">
PG
<input id="ttcontact" type="radio" value="PG-13" name="rating">
PG-13

<input id="ttcontact" type="radio" value="R" name="rating">
R

<input id="ttcontact" type="radio" value="NC-17" name="rating">
NC-17
                </div>
            </div>


            <div id="container" style="float:left; width:561px; height:50px">
                <div id="name" style="float:left; width:150px;">
                    Stars:
                </div>

                <div id="field" style="float:left; width:411px;">
                    <input type="text" name="star" placeholder="Eg: Max, John" />
                </div>
            </div>


            <div id="container" style="float:left; width:561px; height:50px">
                <div id="name" style="float:left; width:150px;">
                    Director:
                </div>

                <div id="field" style="float:left; width:411px;">
                    <input type="text" name="director" />
                </div>
            </div>


            <div id="container" style="float:left; width:561px; height:50px">
                <div id="name" style="float:left; width:150px;">
                    Writers:
                </div>

                <div id="field" style="float:left; width:411px;">
                    <input type="text" name="writers" />
                </div>
            </div>


            <div id="container" style="float:left; width:561px; height:50px">
                <div id="name" style="float:left; width:150px;">
                    Movie Path:
                </div>

                <div id="field" style="float:left; width:411px;">
                    <input type="text" name="path" />
                </div>
            </div>



            <div id="container" style="float:left; width:561px; height:50px; text-align:center">
                <div id="btn" style="float:left;margin-left: 375px; margin-top: 25px;">                
                    <input type="submit" value="Submit" />
               </div>
            </div>  

        <?php echo form_close(); ?>

    </div>

這是我的控制器代碼......

public function upload_data()

{

$this->load->library('form_validation');
    // field name, error message, validation rules
    $this->form_validation->set_rules('movie_name', 'Movie Name', 'trim|required|min_length[4]|xss_clean');
    $this->form_validation->set_rules('date', 'date', 'trim|required|min_length[4]|xss_clean');
    $this->form_validation->set_rules('genres', 'genres', 'trim|required|min_length[4]|xss_clean');


    $this->form_validation->set_rules('star', 'star', 'trim|required|min_length[4]|xss_clean');

    $this->form_validation->set_rules('director', 'director', 'trim|required|min_length[4]|xss_clean');

    $this->form_validation->set_rules('writers', 'writers', 'trim|required|min_length[4]|xss_clean');
    $this->form_validation->set_rules('path', 'path', 'trim|required|min_length[4]|xss_clean');


    if($this->form_validation->run() == FALSE)
    {
        $this->admin();
    }
    else
    {
        $result = $this->site_upload->add_data();

        if ($result)
        {
            $this->load->view('admin');
        }   
    }
}

這是我的標准代碼......

public function add_data()
    {
        $values = array (
            'movie_name' => $this->input->post('movie_name'),
            'date' => $this->input->post('date'),
            'genres' => $this->input->post('genres'),
            'rating' => $this->input->post('rating'),
            'star' => $this->input->post('star'),
            'director' => $this->input->post('director'),
            'writers' => $this->input->post('writers'),
            'path' => $this->input->post('path')
        );

        $rows = $this->db->insert('data',$values);

        return $rows;   
    }

Answer 1

成功插入后可以重定向頁面以防止重復插入。

header("Location: your_submit_page.php?fresh");

Answer 2

if($this->form_validation->run() == FALSE)
{
    $this->admin();
}
else
{
    $result = $this->site_upload->add_data();

    if ($result)
    {
         redirect('/path/you/want/to/redirect'); //do the redirection
    }   
}

redirect()將達到目的。

Answer 3

您還可以替換具有給定ID的簡單按鈕的提交輸入，然后使用（例如）jQuery來監聽該按鈕的“onclick”事件，然后執行POST請求，而不是使用瀏覽器執行此操作你現在。

我發現這種方式更優雅，因為它允許您顯示錯誤消息，而不會讓您重新開始填寫表單，這有時是單調乏味的。 當然，由於當前頁面中沒有帖子標題，您可以根據需要重新加載多次，而無需實際發布。

您可能想向我們展示“表單打開”功能如何解析，主要是為了知道POST的位置。