Upload to Amazon S3 Instead of Server for Sendy Email Image Uploads

gistfile1.php

//Using S3.php from https://github.com/tpyo/amazon-s3-php-class. Place it in includes/helpers
//Replaces Sendy's includes/create/upload.php
// for sendy 2.1.0.2
//Add in includes/config.php =>
  //  define('AWS_ACCESS_KEY', 'xxxx');
  //  define('AWS_SECRET_KEY', 'xxxx');
  //  define('S3_ENDPOINT', 's3.amazonaws.com');
  //  define('S3_BUCKET_NAME', 'xxxx');

<?php
    include('../functions.php');
    include('../login/auth.php');
    require_once('../helpers/S3.php');

    //Init
    $file = $_FILES['upload']['tmp_name'];
    $fileName = $_FILES['upload']['name'];
    $extension_explode = explode('.', $fileName);
    $extension = $extension_explode[count($extension_explode)-1];
    $time = time();
    $allowed = array("jpeg", "jpg", "gif", "png");
    if(in_array($extension, $allowed)) {
        $awsAccessKey = AWS_ACCESS_KEY;
        $awsSecretKey = AWS_SECRET_KEY;
        $bucketName = S3_BUCKET_NAME;
        $s3 = new S3($awsAccessKey, $awsSecretKey, false, S3_ENDPOINT);
        $s3Filename = 'sendy/'.$time.baseName($fileName);
        if ($s3 -> putObject($s3->inputFile($file), $bucketName, $s3Filename, S3::ACL_PUBLIC_READ)) {

            // Required: anonymous function reference number as explained above.
            $funcNum = $_GET['CKEditorFuncNum'] ;
            // Optional: instance name (might be used to load a specific configuration file or anything else).
            $CKEditor = $_GET['CKEditor'] ;
            // Optional: might be used to provide localized messages.
            $langCode = $_GET['langCode'] ;

            $url = 'http://'.S3_ENDPOINT.'/'.$bucketName.'/'.$s3Filename;
            // Usually you will only assign something here if the file could not be uploaded.
            $message = '';

            echo "<script type='text/javascript'>window.parent.CKEDITOR.tools.callFunction($funcNum, '$url', '$message');</script>";
        }
        else exit;
    }
    else exit;
?>