如何从HTML表单发送输入并在php CURL中使用它，然后将其发送到另一个php文件

<form method="POST" action="target.php">
    <!-- 表单元素 -->
    <input type="text" name="username" placeholder="用户名">
    <input type="password" name="password" placeholder="密码">
    <input type="submit" value="提交">
</form>

$username = $_POST['username'];
$password = $_POST['password'];

// 初始化CURL会话
$curl = curl_init();

// 设置请求的URL
curl_setopt($curl, CURLOPT_URL, 'http://example.com/another.php');

// 设置请求方法为POST
curl_setopt($curl, CURLOPT_POST, true);

// 设置POST数据
$postData = array(
    'username' => $username,
    'password' => $password
);
curl_setopt($curl, CURLOPT_POSTFIELDS, $postData);

// 执行请求并获取响应
$response = curl_exec($curl);

// 关闭CURL会话
curl_close($curl);

// 处理响应
// ...

$username = $_POST['username'];
$password = $_POST['password'];