点击

Question

applicant_exam.php

<?php


$sql="SELECT jc.catergory_name,jc.catergory_id,j.role,j.job_id,ex.exam_paper_name,ex.exam_paper_id,ex.dateposted,ex.deadline FROM applicant a LEFT JOIN applicant_apply_job aaj ON a.email=aaj.email LEFT JOIN job j ON aaj.job_id=j.job_id LEFT JOIN job_catergory jc ON j.catergory_id=jc.catergory_id LEFT JOIN exam_paper ex ON j.job_id=ex.job_id WHERE ex.status='1' AND a.email='koshila827@gmail.com'";

$result = mysqli_query($dbcon, $sql);
?>


<table>
  <caption>Available Exams</caption>
  <thead>
    <th>Category Name</th>
     <th>Role</th>
      <th>Exam Paper Name</th>
      <th>Dareposted</th>
      <th>Closing Date</th>
      <th>Action</th>

    </tr>
  </thead>


<?php
while($row = mysqli_fetch_array($result)){ 
?>
 <tr>
    <td><?php echo $row["catergory_name"]; ?></td>
    <td> <?php echo $row["role"]; ?></td>
    <td><?php echo $row["exam_paper_name"]; ?></td>
    <td> <?php echo $row["dateposted"]; ?></td>
    <td><?php echo $row["deadline"]; ?></td>
    <td>



    <a href="start_exam_paper.php?exid=<?php echo $row['exam_paper_id'];?>&catid=<?php echo $row['catergory_id'];?>&jobid=<?php echo $row['job_id'];?>">
 <button id="start" class="delBtn"><i class="fa fa-arrow-circle-right"></i>&nbsp;Start Exam</button>




</a>
    </td>
</tr> 
     <?php

         } ?>       
             </table> 

点击applicant_exam.php中的“开始考试”按钮后，重新加载到“start_exam.php” 如何隐藏“点击后的开始按钮”。 当用户可以在Web浏览器中单击后退按钮时，按钮要隐藏

Answer 1

在按钮上使用Javascript：

hover

隐藏按钮，直到会话关闭。 将会话存储用作：

:

Answer 2

您可以通过在php中使用会话来实现此目的。

在applicant_exam.php中添加此

<?php
   //start session
   if (session_status() == PHP_SESSION_NONE) {
    session_start();
    $_SESSION["Visibility"] = "visible";
 }

$sql="SELECT jc.catergory_name,jc.catergory_id,j.role,j.job_id,ex.exam_paper_name,ex.exam_paper_id,ex.dateposted,ex.deadline FROM applicant a LEFT JOIN applicant_apply_job aaj ON a.email=aaj.email LEFT JOIN job j ON aaj.job_id=j.job_id LEFT JOIN job_catergory jc ON j.catergory_id=jc.catergory_id LEFT JOIN exam_paper ex ON j.job_id=ex.job_id WHERE ex.status='1' AND a.email='koshila827@gmail.com'";

$result = mysqli_query($dbcon, $sql);
?>

现在在锚点，

<a href="start_exam_paper.php?exid=<?php echo $row['exam_paper_id'];?>&catid=<?php echo $row['catergory_id'];?>&jobid=<?php echo $row['job_id'];?>" 
            //this will set the visibility
 style="visibility:<?php echo $_SESSION["Visibility"]; ?>">
 <button id="start" class="delBtn"><i class="fa fa-arrow-circle-right"></i>&nbsp;Start Exam</button> 
</a>

现在在start_exam.php中，在顶部执行此操作，

<?php 
 $_SESSION["Visibility"] = "hidden";
?>

因此，当用户回到applicant_exam.php时，可见性将被隐藏，因此它不会出现。