如何在PHP mail（）中使文本变为粗体？

Question

I would like to mail some text as bold in my email content. I have used the following code

$to = 'some@gmail.com';
    $headers = 'MIME-Version: 1.0' . "\r\n";
    $headers .= 'Content-Type: text/html; charset=UTF-8' . "\r\n";
        $from = $param['email']; // this is the sender's Email address
    $headers = "From:" . $from;

    $name = $param['name'];

    $subject = "Test";

    $message =  "message.\n\n" 
                ."<b>Name:</b> ".$name . "\n\n"
                ."Adress: \n" 
                .$param['address'] . "\n"
                .$param['zip'] . ", "
                .$param['postal_area'] . "\n\n"
                ."E-post: ".$param['email'] . "\n\n\n"

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

I have used <strong> also instead of <b> tag, but nothing works. I get mail in the below format :

<b>Namn:</b> some name

Adress:
Borås, Sweden
4837, Boras

E-post: somemail@gmail.com

Answer 1

You are overwriting the header variable again. You need to append to it.

 $headers .= "From:" . $from; //You forgot to concatenate here...
//     ---^ //Add the .

Answer 2

Try setting the font weight property in a span:

$message = "E-post: <span style='font-weight:strong;'>".$param['email']."</span>";

But also see other reply, you are overwriting the header so it is not reading the message as HTML.