如何在php中发送包含多个表单域的电子邮件

ini_set('SMTP', 'smtp.example.com');
ini_set('smtp_port', 25);
ini_set('username', 'your_username');
ini_set('password', 'your_password');

<form action="send_email.php" method="post">
  <label for="name">姓名：</label>
  <input type="text" name="name" id="name">
  <br>
  <label for="email">邮箱：</label>
  <input type="email" name="email" id="email">
  <br>
  <label for="message">消息：</label>
  <textarea name="message" id="message"></textarea>
  <br>
  <input type="submit" value="发送邮件">
</form>

$name = $_POST['name'];
$email = $_POST['email'];
$message = $_POST['message'];

$to = 'recipient@example.com';
$subject = '来自表单的邮件';

$headers = "From: $name <$email>" . "\r\n";
$headers .= "Reply-To: $email" . "\r\n";
$headers .= "Content-Type: text/html; charset=UTF-8" . "\r\n";

$body = "<h2>表单提交的信息：</h2>";
$body .= "<p><strong>姓名：</strong> $name</p>";
$body .= "<p><strong>邮箱：</strong> $email</p>";
$body .= "<p><strong>消息：</strong> $message</p>";

mail($to, $subject, $body, $headers);

if (mail($to, $subject, $body, $headers)) {
  echo "邮件发送成功！";
} else {
  echo "邮件发送失败，请稍后再试。";
}