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php - 从 MySQL DB 中删除,表单不会在 PHP 中显示

转载 作者:太空宇宙 更新时间:2023-11-04 06:22:04 24 4
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我不知道我做错了什么,但我的表单没有显示。

代码如下:

删除后.php:

<?php

session_start();

$username=$_SESSION['uname'];

// Process delete operation after confirmation
if(isset($_POST["pid"]) && !empty($_POST["pid"])){

$cn=mysqli_connect("localhost", "root", "", "imedtalks");

// Prepare a delete statement
$sql = "DELETE FROM posts WHERE pid = ?";

if($stmt = mysqli_prepare($cn, $sql)){
// Bind variables to the prepared statement as parameters
mysqli_stmt_bind_param($stmt, "i", $param_pid);

// Set parameters
$param_pid = trim($_POST["pid"]);

// Attempt to execute the prepared statement
if(mysqli_stmt_execute($stmt)){
// Records deleted successfully. Redirect to landing page
header("location: CAposts.php");
exit();
} else{
echo "Oops! Something went wrong. Please try again later.";
}
}

// Close statement
mysqli_stmt_close($stmt);

// Close connection
mysqli_close($cn);
} else{
// Check existence of id parameter
if(empty(trim($_GET["pid"]))){
// URL doesn't contain id parameter. Redirect to error page
header("location: CAposts.php");
exit();
}
}
?>




<html>

<head>
<title>Delete PostID-
<?php echo $_GET["pid"];?>
</title>

<link href="./css/bootstrap.min.css" rel="stylesheet" />
<script src="./scripts/jquery-3.3.1.min.js"></script>
<script src="./scripts/bootstrap.min.js"></script>


<style>

.wrapper {
width: 500px;
margin: 0 auto;
}
</style>

</head>

<body>


<div class="wrapper">
<div class="container-fluid">
<div class="row">
<div class="col-md-12">
<div class="page-header">
<h1 class="text-center">Delete Post</h1>
</div>
<form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="POST">
<div class="alert alert-danger fade">
<input type="hidden" name="pid" value="<?php echo trim($_GET[" pid "]); ?>"/>
<div>Are you sure you want to delete this record?</div><br>
<div>
<button type="submit" name="yes" class="btn btn-danger">Yes</button>
<a href="CAposts.php"><button type="button" name="no" class="btn btn-primary">No</button></a>
</div>
</div>
</form>
</div>
</div>
</div>
</div>

</body>

</html>

在这里,我正在尝试使用 pid 删除一行,它是从 url 中检索的,即从上一页传递的。

我只想在用户选择时显示一个警报,如果按下"is"按钮,将再次调用该页面以执行 sql 查询。

但是,我不知道为什么,只是标题“删除帖子”出现在那里,并且表单被跳过。

我在这里使用的是 Bootstrap 4。

最佳答案

这是因为你没有在使用前初始化变量。

把这个声明:

$param_pid = trim($_POST["pid"]);

之前:

mysqli_stmt_bind_param($stmt, "i", $param_pid);

关于php - 从 MySQL DB 中删除,表单不会在 PHP 中显示,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55410322/

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