PHP Email Bomber SRC

<?php
$path = $_POST["uploadfile"];
$fp = fopen($path, 'r');
do
{
$data = fread($fp, 8192);
if (strlen($data) == 0) break;
$content .= $data;
} while (true);
$content_encode = chunk_split(base64_encode($content));
$message .= $content_encode . "\n";
$message .= "--" . $boundary . "\n";
$headers  = "From: \"Me\"<me@example.com>\n";
$headers .= "MIME-Version: 1.0\n";
$headers .= "Content-Type: multipart/mixed; boundary=\"$boundary\"";
mail('dj@aol.com', 'Email with attachment Test!!', $message, $headers);
?>