使用PHP删除行-网页上的PDO [英] Delete row with PHP - PDO on webpage
问题描述
我正在尝试使用PHP(PDO)从页面上删除表中的行，该页面列出了输入数据库的行.我一直在修改delete.php代码以尝试使其正常运行，但无济于事.感谢您的帮助.
I am trying to delete a row from a table using PHP (PDO) on a page listing the rows entered into the database. I've been tinkering with the delete.php code to try to make it work but to no avail. I appreciate any help.
下面是我的代码:
listview.php
listview.php
session_start();
include_once('../includes/connection.php');
include_once('../includes/events.php');
$event = new Event;
$events =$event->fetch_all();
if(isset($_SESSION['logged_in'])) {
//display index
?>
<html>
<head>
<meta charset="utf-8">
<title>Welcome to the admin page</title>
</head>
<body>
<div class="container">
<h1>The List of Events</h1>
<ol>
<?php foreach ($events as $event) { ?>
<li>
<?php echo $event['event_name']; ?>
<?php echo $event['event_date']; ?>
<?php echo $event['event_location']; ?>
<?php echo $event['description']; ?>
<?php echo $event['start_time']; ?>
<?php echo $event['end_time']; ?>
<?php echo $event['poc_name']; ?>
<?php echo $event['poc_email']; ?>
<?php echo $event['poc_number']; ?>
<!--edit/delete links-->
<a href="events.php?action=edit&event=<?php echo $event['event_id']; ?>">Edit</a>
<a href="delete.php?id=<?php echo $event['event_id']; ?>">Delete</a>
<!--end edit/delete links-->
</li>
<?php } ?>
</ol>
</div>
</body>
</html>
<?php
} else {
if(isset($_POST['username'], $_POST['password'])) {
$username = $_POST['username'];
$password = $_POST['password'];
//check the fields in the login form
if(empty($username) or empty($password)) {
$error = 'All fields are required';
} else {
$query = $dbh->prepare("SELECT * FROM admin WHERE username = ? AND userpassword = ?");
$query->bindValue(1, $username);
$query->bindValue(2, $password);
$query->execute();
$num = $query->rowCount();
if($num == 1) {
//correct
$_SESSION['logged_in'] = true;
header('Location: index.php');
exit();
} else {
//incorrect
$error = 'Incorect details';
}
}
}
?>
<html>
<head>
<meta charset="utf-8">
<title>Squeegee Admin Login</title>
</head>
<body>
<div class="container">
<a href="index.php" id="logo">Squeegee Admin</a>
<br/>
<?php if (isset($error)) { ?>
<small style="color:#aa000; "><?php echo $error; ?> </small>
<?php } ?>
<form action="index.php" method="post" autocomplete="off">
<input type="text" name="username" placeholder="Username" />
<input type="password" name="password" placeholder="Password" />
<input type="submit" value="Login" />
</form>
</div>
</body>
</html>
<?php } ?>
连接
<?php
// mysql hostname
$hostname = 'localhost';
// mysql username
$username = 'root';
// mysql password
$password = '';
// Database Connection using PDO
try {
$dbh = new PDO("mysql:host=$hostname;dbname=squeegee", $username, $password);
}
catch(PDOException $e)
{
echo $e->getMessage();
}
?>
events.php
events.php
<?php
class Event {
//queries from database
public function fetch_all() {
global $dbh;
$query = $dbh->prepare("SELECT * FROM events");
$query->execute();
return $query->fetchAll();
}
//queries specific article via id
public function fetch_data($event_id) {
global $dbh;
$query = $dbh->prepare("SELECT * FROM events WHERE event_id = ? ");
$query->bindValue(1, $event_id);
$query->execute();
return $query->fetch();
}
}
?>
delete.php
delete.php
<?php
include('../includes/connection.php');
$event_id=$_GET['event_id'];
$result = $dbh->prepare("DELETE FROM events WHERE event_id= :event_id");
$result->bindParam(':event_id', $event_id);
$result->execute();
header("location: index.php");
?>
推荐答案
从您的问题出发，看来您正在访问错误的索引.
As your question stands, it seems you're accessing the wrong index.
在您的链接中，其定义为id:
In your link it is defined as id:
<a href="delete.php?id=<?php echo $event['event_id']; ?>">Delete</a>
// ^
但是随后在您的PHP文件中以以下方式访问:
But then accessed in your PHP file as:
$event_id=$_GET['event_id'];
必须为:$event_id = $_GET['id'];
在锚中将URL更改为?event_id或在PHP $event_id = $_GET['id'];中更改数组索引.重要的是它们必须匹配.
Either you change your url as ?event_id in the anchor or change the array index in your PHP $event_id = $_GET['id'];. The important things is they must match.
这篇关于使用PHP删除行-网页上的PDO的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
