Form contact mail php in bold

I use this really simple and great mail contact form: http://www.saaraan.com/2011/12/making-simple-jquery-ajax-contact-form It work fine !

But I would like that the message content, writed by the visitor, be bold in my email box.

This is possible ?

My php code :

<?php
if($_POST)
{
//check if its an ajax request, exit if not
if(!isset($_SERVER['HTTP_X_REQUESTED_WITH']) AND strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) != 'xmlhttprequest') {
    die();
} 

$to_Email       = "myemail@gmail.com"; //Replace with recipient email address
$subject        = 'Ah!! My email from Somebody out there...'; //Subject line for emails

//check $_POST vars are set, exit if any missing
if(!isset($_POST["userName"]) || !isset($_POST["userEmail"]) || !isset($_POST["userPhone"]) || !isset($_POST["userMessage"]))
{
    die();
}

//Sanitize input data using PHP filter_var().
$user_Name        = filter_var($_POST["userName"], FILTER_SANITIZE_STRING);
$user_Email       = filter_var($_POST["userEmail"], FILTER_SANITIZE_EMAIL);
$user_Phone       = filter_var($_POST["userPhone"], FILTER_SANITIZE_STRING);
$user_Message     = filter_var($_POST["userMessage"], FILTER_SANITIZE_STRING);

//additional php validation
if(strlen($user_Name)<4) // If length is less than 4 it will throw an HTTP error.
{
    header('HTTP/1.1 500 Name is too short or empty!');
    exit();
}
if(!filter_var($user_Email, FILTER_VALIDATE_EMAIL)) //email validation
{
    header('HTTP/1.1 500 Please enter a valid email!');
    exit();
}
if(!is_numeric($user_Phone)) //check entered data is numbers
{
    header('HTTP/1.1 500 Only numbers allowed in phone field');
    exit();
}
if(strlen($user_Message)<5) //check emtpy message
{
    header('HTTP/1.1 500 Too short message! Please enter something.');
    exit();
}

//proceed with PHP email.
$headers = 'From: '.$user_Email.'' . "rn" .
'Reply-To: '.$user_Email.'' . "rn" .
'X-Mailer: PHP/' . phpversion();

@$sentMail = mail($to_Email, $subject, $user_Message .'  -'.$user_Name, $headers);

if(!$sentMail)
{
    header('HTTP/1.1 500 Couldnot send mail! Sorry..');
    exit();
}else{
    echo 'Hi '.$user_Name .', Thank you for your email! ';
    echo 'Your email has already arrived in my Inbox, all I need to do is Check it.';
}
}?>

Solution

It is possible. Normally, php mail function sends it's content in plain text form. To send it as HTML, which will enable html markup, use this:

// To send HTML mail, the Content-type header must be set
$headers .= "\r\n" . 'Content-type: text/html; charset=iso-8859-1';
// I have changed the above to add new lines before the string, so you can add it before the mail function

this is an extract from http://php.net/manual/en/function.mail.php

Of course, you should also change the charset to preferred one, like utf-8.

You can either change this:

$headers = 'From: '.$user_Email.'' . "\r\n" .
'Reply-To: '.$user_Email.'' . "\r\n" .
'X-Mailer: PHP/' . phpversion();

...to:

$headers = 'From: '.$user_Email.'' . "\r\n" .
'Reply-To: '.$user_Email.'' . "\r\n" .
'X-Mailer: PHP/' . phpversion() . "\r\n" .
'Content-type: text/html; charset=utf-8'

Regarding your question in comments:

See this: @$sentMail = mail($to_Email, $subject, $user_Message .' -'.$user_Name, $headers); The third parameter is the message you send. Since we added a header informing that a HTML document will be sent, we can use HTML tags.

To do so, edit $user_message to contain HTML document. For example, to simply make all the text bold, make $user_message = '<html><head></head><body><b>' . $user_message . '</b></body></html>'. When you add the Content-type: text/html header, the $user_message behaves exactly like a webpage, you can use almost all html tags.