PHP Output of a foreach included in a mail variable - php

Question

I want to include the output of a foreach loop + echo $total as the variable $order in my sendmail.php. Can somebody help me? I am a bit stuck.
My sendmail.php:
<?php
if(!isset($_SESSION)) {
session_start();
}
$to = $_SESSION['email'];
$firstname = $_SESSION['firstname'] ;
$lastname = $_SESSION['lastname'] ;
$email = $_SESSION['email'] ;
$addressline1 = $_SESSION['addressline1'] ;
$towncity = $_SESSION['towncity'] ;
$postcode = $_SESSION['postcode'] ;
foreach ($_SESSION['invoice'] as $value) { //needs to = $order
echo $value."<br>";} //needs to = $order
echo "Total: $".$_SESSION['total']; //needs to = $order
//set subject
$subject = "Crystal Fusion - New Order";
//body of the e-mail
$body = "New Order Received:\n\n\n\n
From: $firstname $lastname\n
Email: $email\n
Address: $addressline1\n
Town/City: $towncity\n
Postcode: $postcode\n
Order: $order"; //needs to = foreach loop above
$sent = mail($to, $subject, $body);
if($sent)
{echo "<script language=javascript>window.location = 'mail_succeed.php';</script>";}
else
{echo "<script language=javascript>window.location = 'mail_fail.php';</script>";}
?>

Answer 1

The solution would be to use something along the lines of
ob_start();
// Add your output
foreach ($_SESSION['invoice'] as $value) { //needs to = $order
echo $value."<br>";} //needs to = $order
echo "Total: $".$_SESSION['total']; //needs to = $order
// if you need your logic at multiple places, consider using a separate php file and including it here
// ...
$body=ob_get_contents();
ob_end_clean();
mail($to, $subject, $body);

Answer 2

How about changing your foreach loop to:
$order = '';
foreach ($_SESSION['invoice'] as $value) { //needs to = $order
echo $value."<br>"; //needs to = $order
$order .= $value."\n";
}
echo "Total: $".$_SESSION['total']; //needs to = $order
$order .= "Total: $".$_SESSION['total'];