由于某种原因，当我发送电子邮件时，HTML仍然以纯文本显示。有人可以告诉我我在这里做错了什么吗？
这是代码：
$to = $_SESSION['customer_email'];
$from = "noreplay@mysite.com";
$subject = "Confirmation for Appointment on ".$_SESSION['display_date'];
$headers = "From: ".$from."'r'n";
$headers .= "Content-type: text/html; charseet=UTF-8;'r'n";
$headers .= "MIME-Version: 1.0;'r'n";
$message = "<p>Thank you".$_SESSION['firstname']." for booking online. Your appointment has been confirmed and is scheduled for <strong>".$_SESSION['display_date']."</strong> between the hours of <strong>".$_SESSION['display_time']."</strong>.</p><p> Please expect our crew to arrive between your two hour arrival window. You will receive a courtesy call when our crew is <span>15-30 minutes</span> away. A confirmation email has been sent to <strong>".$_SESSION['customer_email']."</strong>. </p><p> If you have any questions or need to make any changes to your appointment, please contact our office at <strong>1-800-333-1111</strong>. Thank you for choosing Us!
</p>";
if(mail($to, $subject, $message, $header ))
{
$msg = "Your message has been sent";
}
$headers .= "Content-type: text/html; charseet=UTF-8;'r'n";
应该是
$headers .= "Content-type: text/html; charset=UTF-8;'r'n";
两个错别字：
if(mail($to, $subject, $message, $header ))
应该是
if(mail($to, $subject, $message, $headers ))
和在
$headers .= "Content-type: text/html; charseet=UTF-8;'r'n";
将"charseet"更改为
Content-Type: text/html; charset=ISO-8859-1'r'n
现在看来你可以使用UTF-8
Content-Type: text/html; charset=UTF-8'r'n
和
if(mail($to, $subject, $message, $header))
自
if(mail($to, $subject, $message, $headers))
还mail的回归：
如果邮件已成功接受传递，则返回 TRUE，否则返回 FALSE。 重要的是要注意，仅仅因为邮件被接受投递，它 并不意味着邮件将实际到达预定目的地。