PHPMailer但未选择附件-无法发送电子邮件-表单消失

require 'PHPMailer/PHPMailer.php';
require 'PHPMailer/SMTP.php';

// 创建PHPMailer实例
$mail = new PHPMailer\PHPMailer\PHPMailer();

// 配置SMTP服务器
$mail->isSMTP();
$mail->Host = 'smtp.example.com';
$mail->SMTPAuth = true;
$mail->Username = 'your-email@example.com';
$mail->Password = 'your-password';
$mail->SMTPSecure = 'tls';
$mail->Port = 587;

// 设置发件人和收件人
$mail->setFrom('your-email@example.com', 'Your Name');
$mail->addAddress('recipient@example.com', 'Recipient Name');

// 设置邮件主题和正文内容
$mail->Subject = 'Test Email';
$mail->Body = 'This is a test email.';

// 添加附件
$mail->addAttachment('/path/to/file1.pdf', 'File 1');
$mail->addAttachment('/path/to/file2.jpg', 'File 2');

// 发送邮件
if ($mail->send()) {
    echo 'Email sent successfully.';
} else {
    echo 'Failed to send email: ' . $mail->ErrorInfo;
}