<?php // Define XML file path and notepad data table name $xmlFilePath = 'data.xml'; $tableName = 'notes'; //Create database connection (XML

A new one. I wanted to use XML to create a simple notepad function, so I found a code. After running, you can add it, but you can't delete it.-PHP Chinese Network Q&A

<?php  
// 定义XML文件路径和记事本数据表名  
$xmlFilePath = 'data.xml';  
$tableName = 'notes';  
  
// 创建数据库连接（XML文件）  
$xml = simplexml_load_file($xmlFilePath);  
  
// 添加记事本记录  
if (isset($_POST['submit'])) {  
    $title = $_POST['title'];  
    $content = $_POST['content'];  
  
    // 在XML文件中创建新的记事本记录  
    $newNote = $xml->addChild('note');  
    $newNote->addChild('title', $title);  
    $newNote->addChild('content', $content);  
  
    // 保存XML文件  
    $xml->asXML($xmlFilePath);  
}  
  
// 删除记事本记录  
if (isset($_GET['delete'])) {  
    $noteId = $_GET['delete'];  
  
    // 在XML文件中删除指定记事本记录  
    foreach ($xml->xpath("//note[@id='$noteId']") as $note) {  
        $noteParent = $note->xpath('..');  
        unset($noteParent[0][$note->getName()]);  
    }  
  
    // 保存XML文件  
    $xml->asXML($xmlFilePath);  
}  
 
/*if (isset($_GET['delete'])) {    
    $noteId = $_GET['delete'];    
    
    $notes = $xml->xpath("//note[@id='$noteId']");    
    if (isset($notes[0])) {    
        unset($notes[0]);    
    }    
    
    $xml->asXML($xmlFilePath);    
}
*/
  
// 更新记事本记录  
if (isset($_POST['update'])) {  
    $noteId = $_POST['id'];  
    $title = $_POST['title'];  
    $content = $_POST['content'];  
  
    // 在XML文件中更新指定记事本记录  
    foreach ($xml->xpath("//note[@id='$noteId']") as $note) {  
        $note->title = $title;  
        $note->content = $content;  
    }  
  
    // 保存XML文件  
    $xml->asXML($xmlFilePath);  
}  
  
// 查询记事本记录  
$notes = $xml->xpath("//note");  
?>  
<!DOCTYPE html>  
<html>  
<head>  
    <title>网络记事本</title>  
</head>  
<body>  
    <h1>网络记事本</h1>  
  
    <!-- 添加记事本记录 -->  
    <form method="post" action="">  
        <label for="title">标题:</label>  
        <input type="text" name="title" id="title" required><br><br>  
        <label for="content">内容:</label><br>  
        <textarea name="content" id="content" rows="4" cols="50" required></textarea><br><br>  
        <input type="submit" name="submit" value="添加记录">  
    </form>  
  
    <!-- 显示记事本记录 -->  
    <h2>记事本记录</h2>  
    <ul>  
        <?php foreach ($notes as $note): ?>  
            <li id="note_<?php echo $note->id; ?>">  
                标题: <?php echo $note->title; ?>, 内容: <?php echo $note->content; ?>  
                <a href="?delete=<?php echo $note->id; ?>">删除</a>  
            </li>  
        <?php endforeach; ?>  
    </ul>  
</body>  
</html>

is a new one. I wanted to use XML to create a simple notepad function, so I found a code. After running, you can add it, but you can't delete it. Please help me, teacher. Thank you~ QQ截图20231027090436.png