Question

当我重新加载/刷新表单时数据消失。

我的获取数据的查询..

 public function view_detail()
    {
        $qry=$this->conn->prepare("SELECT * FROM student_detail WHERE Student_Cnic=:search OR Student_Name=:search");
        $qry->bindParam(':search',$this->stsearch);

        $qry->execute();
        return $qry;
    }

我发送数据的表单

 <form action="view.php" method="post" id="view_form">
                            <br>
                            <label for="">View By Name or CNIC</label>
                            <input type="text" class="form-control" name="stu-view" id="stu-view" placeholder="Student Name or CNIC"><br>

                            <input type="submit" name="view-detail" id="view-detail" class="btn btn-success" value="Enroll"><br>
                        </form>

我填充数据的表单

<?php
include 'header.php';
include 'config.php';
include 'classes.php';
$database=new Database();
$db=$database->getConnection();
$gtstu=new stu_sys($db);

if(isset($_POST['stu-view']))
{
$_SESSION['stusearch'] = $_POST['stu-view'];
if(isset($_SESSION['stusearch'])){
    $gtstu->stsearch = $_SESSION['stusearch'];
}
}
$fth = $gtstu->view_detail();


?>


<div class="row">
    <div class="col-lg-12">

        <div class="col-lg-2"></div>
        <div class="col-lg-8" style="margin-top: 10%;">

            <table class="table table-responsive table-bordered">
                <th>Image</th>
                <th>Name</th>
                <th>Cnic</th>
                <th>Department</th>
                <th>View Detail</th>
                <?php while($row = $fth->fetch(PDO::FETCH_OBJ)):?>
                <tr>
                    <td><img src="images/<?php echo $row->Student_Image; ?>" alt=""/></td>
                    <td><?php echo $row->Student_Name ?></td>
                    <td><?php echo $row->Student_Cnic ?></td>
                    <td><?php echo $row->Deprt ?></td>
                    <td><a href="#">View More Detail</a></td>
                </tr>
                <?php endwhile;?>
            </table>
            <a href="dashboard.php" class="btn btn-primary">Back TO Dashboard</a>
        </div>
        <div class="col-lg-2"></div>

    </div>

</div>











<?php
include 'footer.php'
?>

我不知道为什么表单变空，意味着当我重新加载页面时数据被擦除..

任何帮助将不胜感激。

Answer 1

if(isset($_POST['stu-view']))
{
   $_SESSION['stusearch'] = $_POST['stu-view'];     
}

// Move this out
if(isset($_SESSION['stusearch'])){
   $gtstu->stsearch = $_SESSION['stusearch'];
    }

我认为您不会重新发送表单中的数据。因此，您没有从会话中获取数据，因为您只在发送数据时查看会话，

Answer 2

假设您正在谈论自己的表格＆＃34;从＆＃34;发送数据，您应该在文本框中添加一个值属性（stu-view）并用提交的搜索值填充它，即添加：

value="<?php echo $_SESSION['stusearch']; ?>"

Answer 3

填充数据的表单永远不会起作用，原因很简单：你没有包含session_start（）;在代码的顶部。因此，在页面刷新时，会话将被销毁。

我的错误：我忘记在页面顶部添加session_start()。

页面刷新后，数据从php中消失

3 个答案: