web-development/zoesch.de/ImageUpload/views/upload.php

<?php
//complete source code for views/upload.php
//$newImageSubmitted is TRUE if form was submitted, otherwise FALSE
$newImageSubmitted = isset($_POST['new-image']);
if ($newImageSubmitted) {
    //this code runs if form was submitted
$output = upload();
} else {
    //this runs if form was NOT submitted
$output = include_once 'views/upload-form.php';
}

return $output;
//declare new function
function upload()
{
    include_once 'classes/Uploader.class.php';
    //image-data is the name attribute used in <input type='file' />
    $uploader = new Uploader('image-data');
    $uploader->saveIn('img');
    $fileUploaded = $uploader->save();
    if ($fileUploaded) {
        $out = 'new file uploaded';
    } else {
        $out = 'something went wrong';
    }

    return $out;
}