Trouble getting Users IP - php

Question

The form action is linked to this php script:
<?php
$email = $_POST['subscribefield'];
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
echo "Dit adres klopt niet";
die();
}
$to = "flash1996mph#hotmail.com";
$subject = "Abonee voor de nieuwsbrief";
$body = "$email \n Heeft zich aangemeld voor de nieuwsbrief";
mail($to, $subject, $body);
echo "U bent succesvol aangemeld voor de Vandenberg nieuwsbrief";
echo $_SERVER['REMOTE_ADDR'];
?>
At the end i added echo $_SERVER['REMOTE_ADDR']; then i checked my mail, but there was nothing. Did i use the code the wrong way?
EDIT:
<?php
$email = $_POST['subscribefield'];
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
echo "Dit adres klopt niet";
die();
}
$to = "flash1996mph#hotmail.com";
$subject = "Abonee voor de nieuwsbrief";
$body = "$email \n Heeft zich aangemeld voor de nieuwsbrief";
$body .= $_SERVER['REMOTE_ADDR'];
mail($to, $subject, $body);
echo "U bent succesvol aangemeld voor de Vandenberg nieuwsbrief";
?>
The above is an edit^

Answer 1

When mail is called the email is sent. In your script $body is the body of the email so append the IP address on to that variable before you call the mail function.
$to = "flash1996mph#hotmail.com";
$subject = "Abonee voor de nieuwsbrief";
$body = "$email \n Heeft zich aangemeld voor de nieuwsbrief";
$body .= $_SERVER['REMOTE_ADDR'];
mail($to, $subject, $body);
The echo currently just outputs the IP on the browser.