将 php 开关链接到 html php 页面

Question

您好，我正在尝试将 PHP switch 语句与 html 链接中的一些 PHP 文件链接。 Basically I have one file that has a switch statement and I'm trying to link that with html some html href and html dropdown list so that they can redirect to another PHP page. 如果这已经发布，我很抱歉，我找不到任何可以帮助的东西。 这是 html 的文件：

<html>
<body>
<div id="NavMenu">
<a href="index.php?page=Home"> HOME </a>
<a href="index.php?page=Gallery"> GALLERY </a>

<select name='page' id='page'>
  <option value="DieRoller">DieRoller</option>
  <option value="Converter">Converter</option>
</select>
</body>
</html>

这是处理 switch 语句的文件：

<?php
    
    require_once('includes/NavMenu.php');
    

     
?>
<HTML>
<div id= "DynamicContent">
<?php
    $page = $_REQUEST['page'] ?? "null";
    if(isset($_GET['page'])){
    
    echo $page = $_GET['page'];   
 
     switch($page){
    case 'Home':
        echo 'HOME';
        break;
     case 'Gallery':
         require 'C:\xampp\htdocs\includes\Gallery.php';
         break;
    case 'DieRoller':
        require 'C:\xampp\htdocs\includes\DieRoller.php';
        break;
    case 'Converter':
        require 'C:\xampp\htdocs\includes\converter.php';
        break;
      default:
         echo 'not';
         break;
    }
 }
 ?>
</div>
</HTML>