You can view this file in context here: https://github.com/caseysoftware/upgrading-google-voice-with-Twilio

rev2-recorded.php

<?php

include 'functions.php';

header("Content-type: text/xml");

$filter     = "!@#$^&%*()+=-[]\/{}|:<>?,.";
$recording  = preg_replace("/[$filter]/", "", $_POST['RecordingUrl']);
$duration   = (int) $_POST['RecordingDuration'];

$from       = preg_replace("/[^0-9]/", "", $_GET['From']);

$subject = "You have a new voicemail from " . $from;
$body = "You received a $duration second voicemail." .
            "\n\nHere is the recording: " . $recording;

mail($toEmail, $subject, $body);

$response = new Services_Twilio_Twiml();
$response->hangup();

print $response;