SparkPost relay webhooks sample

extractRelayAttachments.php

<?php
/* Dependencies:
 * - php-mime-mail-parser (https://github.com/php-mime-mail-parser/php-mime-mail-parser)
 * - The mailparse extension  (http://php.net/manual/en/book.mailparse.php)
 */ 
require 'vendor/autoload.php';

$messages = json_decode(file_get_contents('php://input'));

foreach ($messages as $msg) {
  $emailBody = $msg->msys->relay_message->content->email_rfc822;
  if ($msg->msys->relay_message->content->email_rfc822_is_base64) {
    $emailBody = base64_decode($emailBody);
  }

  // Parse the message, save and list attachments
  $parser = new PhpMimeMailParser\Parser();
  $parser->setText($emailBody);

  $parser->saveAttachments('/somewhere/safe/');

  $attachments = $parser->getAttachments();
  foreach ($attachments as $file) {
    echo('Filename: ' . $file->getFilename() . '<br>');
  }
}
?>