why is my form submitting to an excel file?

Okay all, I have a form that I want users to fill out. When They click submit, I want the contents of this form to be put into a message, and I want the contents to be added to an excel file. Then I want the message that is sent to the recipient to have an attachment of that excel file. You will see partial mime code, I have no Idea how to use it, that was my attempt at figuring this out... Heres what I have so far:

I guess the main question is more specifically, what in the code is making the contents the user submits, automatically go into an excel file and attach itself to the email?

$date = $_POST['date'];
$org =$_POST['Org'];
$activity =$_POST['activ'];
$dofevent = $_POST['dateoe'];
$money= $_POST['amountreq'];
$name =$_POST['name'];
$email =$_POST['email'];
$phone =$_POST['pnumber'];
$dateneeded =$_POST['datenb'];
//bottom
$semester =$_POST['semester'];
$question7a =$_POST['7a'];
$question7b =$_POST['7b'];



$mime_boundary = "<<<--==+X[".md5(time())."]";

$headers .= "From: SAF Request Form "; 
$headers .= "MIME-Version: 1.0\r\n";
$headers .= "Content-Type: multipart/mixed;\r\n";
//$headers .= " boundary=\"".$mime_boundary."\"";
$subject .="SAF Request Form";
//$message .= "This is a multi-part message in MIME format.\r\n";
//$message .= "\r\n";
//$mes开发者_JAVA技巧sage .= "--".$mime_boundary."\r\n";
//$message .= "Content-Type: text/plain; charset=\"iso-8859-1\"\r\n";
//$message .= "Content-Transfer-Encoding: 7bit\r\n";

$message ="this is where I put my message";


mail ("20valvesofturbo@gmail.com",$subject,$message, $headers);



if( mail( "20valvesofturbo@gmail.com", $subject, $message, $headers ) ) {

echo "<p>The email was sent.</p>";

}

else {

echo "<p>There was an error sending the mail.</p>";

}





// start of xcel spreadsheet and header-->

$reg = "../data/eforms/saf/reg.xls";

$ft = fopen($reg,'a');
fwrite($ft,"header information");


// start of information submitted by user
fwrite($ft,  $org); 
fwrite($ft,"user submitted data");

fclose($ft);
//adds all the data



// individual excell sheet
$reg = "../data/eforms/saf/names/$org.xls";

$ft = fopen($reg,'w+');
fwrite($ft,"blablabla");
fclose($ft);



?>

what this does is it submits the data and sends a message, but it sends the data in an unknown file format as an attachment. If you open it in excel, it has the contents of the message...

Thanks!

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For generating MIME encoded messages, I suggest that you use the Pear::Mail_Mime package ( http://pear.php.net/package/Mail_Mime). As for generating an Excel file, you can have a look at http://pear.php.net/package/Spreadsheet_Excel_Writer; depending on the complexity of the data to put into Excel, you could possibly also use just a CSV file