如何在PHP页面重新加载中获取选定的选项值

<select name="myOption">
  <option value="option1">选项1</option>
  <option value="option2">选项2</option>
  <option value="option3">选项3</option>
</select>

$selectedOption = $_POST['myOption'];

<!-- index.html -->
<form action="process.php" method="post">
  <select name="myOption">
    <option value="option1">选项1</option>
    <option value="option2">选项2</option>
    <option value="option3">选项3</option>
  </select>
  <input type="submit" value="提交">
</form>

<!-- process.php -->
<?php
$selectedOption = $_POST['myOption'];
echo "选定的选项值为：" . $selectedOption;
// 进行后续处理
?>