htmlentities在使用PHPmailer时忽略<br>

$mail = new PHPMailer\PHPMailer\PHPMailer();
$mail->IsSMTP();
$mail->CharSet = 'UTF-8';
$mail->Encoding = 'base64';
$mail->isHTML(true);

// 忽略 htmlentities 转义
$mail->Encoding = '8bit';

// 设置其他 PHPmailer 的属性
$mail->Host = 'smtp.example.com';
$mail->Port = 587;
$mail->Username = 'your_username';
$mail->Password = 'your_password';
$mail->SetFrom('sender@example.com', 'Sender Name');
$mail->Subject = 'Subject';
$mail->Body = 'Email body';
$mail->AddAddress('recipient@example.com', 'Recipient Name');

// 发送邮件
if($mail->Send()) {
    echo '邮件发送成功';
} else {
    echo '邮件发送失败: ' . $mail->ErrorInfo;
}