Php 单击delete按钮时，我必须单击两次才能将删除请求发布到MYSQL服务器

my_admin.php文件上的“删除”按钮要求单击两次，然后打开确认选项，将请求的删除请求发布到服务器。谁能告诉我为什么会这样，我想这是某种形式的代码安排

my_admin.php文件如下所示，遇到问题的这一部分位于注释下/****************单击“删除”按钮时从数据库中删除数据/***************/

提前感谢任何能为我指出正确方向的人

     <?php include('includes/header.php'); ?>

<?php

//Include functions
include('includes/functions.php');

//check to see if user if logged in else redirect to index page

if(!isset($_SESSION['user_is_logged_in'])){

  redirect('../index.php');

}

?>

<?php 
/************** Fetching data from database using id ******************/

//require database class files
//require database class files
require('includes/pdocon.php');

//instatiating our database objects
$db = new Pdocon;


//Create a query to select all users to display in the table

$db->query("SELECT * FROM admin WHERE email=:email");

$email  =   $_SESSION['user_data']['email'];

$db->bindValue(':email', $email, PDO::PARAM_STR);

//Fetch all data and keep in a result set
$row = $db->fetchSingle();

?>


<div class="well">

  <small class="pull-right"><a href="customers.php"> View Customers</a> </small>

  <?php  $fullname = $_SESSION['user_data']['fullname'];

    echo '<small class="pull-left" style="color:#337ab7;">' . $fullname .'  | Veiwing / Editing</small>';
?>

    <h2 class="text-center">My Account</h2> <hr>
    <br>
   </div>

<div class="container"> 
   <div class="rows">

   <!-- call your display function to display session message on top page   -->
   <?php showmsg() ?> 

     <div class="col-md-9">

          <?php  // loop through your result set and fill in the form :
            if($row) { ?>


          <br>
           <form class="form-horizontal" role="form" method="post" action="">
            <div class="form-group">
            <label class="control-label col-sm-2" for="name" style="color:#f3f3f3;">Fullname:</label>
            <div class="col-sm-10">
              <input type="name" name="name" class="form-control" id="name" value="<?php echo $row['fullname'] ?>" required>
            </div>
          </div>
          <div class="form-group">
            <label class="control-label col-sm-2" for="email" style="color:#f3f3f3;">Email:</label>
            <div class="col-sm-10">
              <input type="email" name="email" class="form-control" id="email" value="<?php echo $row['email'] ?>" required>
            </div>
          </div>
          <div class="form-group ">
            <label class="control-label col-sm-2" for="pwd" style="color:#f3f3f3;">Password:</label>
            <div class="col-sm-10">
             <fieldset disabled> 
              <input type="password" name="password" class="form-control disabled" id="pwd" value="<?php echo $row['password'] ?>" required>
             </fieldset> 
            </div>
          </div>

          <br>
          <div class="form-group"> 
            <div class="col-sm-offset-2 col-sm-10">
                <a class="btn btn-primary" href="edit_admin.php?admin_id=<?php echo $row['id'] ?>">Edit</a>
                <button type="submit" class="btn btn-danger pull-right" name="delete_form">Delete</button>
            </div>
          </div>



        </form>

  </div>
       <div class="col-md-3">
           <div style="padding-top: 20px;">
             <div class="thumbnail" style="padding-top: 15px;">
              <a href="edit_admin.php?admin_id=<?php echo $row['id'] ?>">

                   <?php  $image = $row['image']; ?>

                <?php echo ' <img src="uploaded_image/' . $image . '"  style="width:150px;height:150px">'; ?> 
              </a>
              <h4 class="text-center"><?php //echo fullname of admin  ?></4>
            </div>
           </div>
       </div>

       <?php } ?>

  </div>  

</div>

<?php 

/************** Deleting data from database when delete button is clicked ******************/  


if(isset($_POST['delete_form'])){

    $admin_id = $_SESSION['user_data']['id'];

    keepmsg('<div class="alert alert-danger text-center">

              <strong>Confirm!</strong> Do you want to delete your account <br>
              <a href="#" class="btn btn-default" data-dismiss="alert" aria-label="close">No, Thanks</a><br>
              <form method="post" action="my_admin.php">
              <input type="hidden" value="' . $admin_id .'" name="id"><br>
              <input type="submit" name="delete_admin" value="Yes, Delete" class="btn btn-danger">
              </form>
            </div>');

}        




//If the Yes Delete (confim delete) button is click from the closable div proceed to delete


   if(isset($_POST['delete_admin'])){

    $id = $_POST['id'];

    $db->query('DELETE FROM admin WHERE id=:id');

    $db->bindValue(':id', $id, PDO::PARAM_INT);

    $run = $db->execute();

    if($run){

        redirect('logout.php');

    }else{

         keepmsg('<div class="alert alert-danger text-center">
                      <a href="#" class="close" data-dismiss="alert" aria-label="close">&times;</a>
                      <strong>Sorry </strong>User with ID ' . $id . ' Could not be deleted 
                </div>');
    }


   }


?>


</div>

</div>

</div>
<?php include('includes/footer.php'); ?>

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之所以发生这种情况，是因为delete_admin表单的html在检查中：

if(isset($_POST['delete_form'])) {
    // html for delete_admin form....
}

这意味着只有在发布/提交删除表单后加载页面时，才会出现相关表单

如果删除该复选框，两个表单都将在页面第一次加载时显示，允许您直接提交delete_admin

---

这个脚本的原始作者似乎有意将此作为一种“确定”步骤。

可能与您的一个函数有关。我希望保留删除的确认信息。但删除按钮本身需要再次单击，然后显示删除确认。这更有意义吗？啊，所有修复了我删除了ifisset$_POST['delete_form']{}解决了问题，但之前不确定引用isset函数的检查是什么意思。再次感谢。