php发送html table邮件

<?php
require 'vendor/autoload.php';

use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;

$mail = new PHPMailer(true);

try {
    // 邮件服务器设置
    $mail->isSMTP();
    $mail->Host = 'smtp.example.com';
    $mail->SMTPAuth = true;
    $mail->Username = 'your_email@example.com';
    $mail->Password = 'your_password';
    $mail->SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS;
    $mail->Port = 587;

    // 发件人
    $mail->setFrom('from@example.com', 'Mailer');

    // 收件人
    $mail->addAddress('recipient@example.com', 'Joe User');

    // 邮件内容
    $mail->isHTML(true);
    $mail->Subject = 'Here is the HTML Table Example';
    $mail->Body    = '<h1>Hello!</h1>
        <p>Here is an example of an HTML table:</p>
        <table>
            <tr>
                <th>Firstname</th>
                <th>Lastname</th>
                <th>Age</th>
            </tr>
            <tr>
                <td>Jill</td>
                <td>Smith</td>
                <td>50</td>
            </tr>
            <tr>
                <td>Eve</td>
                <td>Jackson</td>
                <td>94</td>
            </4>
        </table>';

    $mail->send();
    echo 'Message has been sent';
} catch (Exception $e) {
    echo "Message could not be sent. Mailer Error: {$mail->ErrorInfo}";
}
?>