Email formating: wont recognize variable

[alexchavez]

Would appreciate some help debugging this code.
I'm trying to add the catagory number $catnum to the end of a URL in this tell-a-friend emailer.

It echos ok to the screen but does not get sent in the $email_message

<?
include 'tellafriend/config.php';
$catnum = $_GET["cat"];
echo $catnum; //check to see if cat is passing

if ($Submit)
{
$todayis = date("l, F j, Y, g:i a");
$subject = "Website recommendation by $visitor_name";
$email_message = "$message1

	Website: $address?cid=$catnum

	----------------------------------------
	This email was sent by $visitor_name ($visitor_email)

	";
	$from = "From: $visitor_name<$visitor_email>";
	mail ($sendto,$subject,$email_message,$from);
	$status = "sent";
}

?>

[bradgrafelman]

Try escaping out of the string:

<? 
include 'tellafriend/config.php'; 
$catnum = $_GET["cat"]; 
echo $catnum; //check to see if cat is passing 

if ($Submit) 
{ 
$todayis = date("l, F j, Y, g:i a"); 
$subject = "Website recommendation by $visitor_name"; 
$email_message = "$message1 

Website: $address?cid=" . $catnum . "

---------------------------------------- 
This email was sent by $visitor_name ($visitor_email) 

"; 
$from = "From: $visitor_name<$visitor_email>"; 
mail ($sendto,$subject,$email_message,$from); 
$status = "sent"; 
} 
?>