Fileupload exception

try {
            if (array_key_exists('uploaded_files', $_FILES)) {
                //Attach multiple files one by one
                for ($i = 0; $i < count($_FILES['uploaded_files']['tmp_name']); $i++) {
                    if ($i == $maximumfiles) {
                        throw new RuntimeException('<div class="alert">Sie haben zuviele Dateien hochgeladen.</div>');
                    }
                    if (!isset($_FILES['uploaded_files']['error'][$i])) {
                        throw new RuntimeException('<div class="alert">Etwas mit Ihren Dateien stimmt nicht.</div>');
                    }
                    switch ($_FILES['uploaded_files']['error'][$i]) {
                        case UPLOAD_ERR_OK:
                            break;
                        // case UPLOAD_ERR_NO_FILE:
                        //     throw new RuntimeException('<div class="alert">Eine Ihrer Dateien scheint nicht verschickt worden zu sein.</div>');
                        case UPLOAD_ERR_INI_SIZE:
                        case UPLOAD_ERR_FORM_SIZE:
                            throw new RuntimeException('<div class="alert">Eine Ihrer Dateien scheint von der Datenmenge groß zu sein.</div>');
                        // default:
                        //     throw new RuntimeException('<div class="alert">Ein unbekannter Fehler ist aufgetreten.</div>');
                    }
                    if ($_FILES['uploaded_files']['size'][$i] > 5000000) {
                        throw new RuntimeException('<div class="alert">Die maximale Dateigröße ist überschritten.</div>');
                    }
                    // if(in_array($finfo->file($_FILES['uploaded_files']['tmp_name'][$i]), $acceptedMime, true) === false){
                    //   throw new RuntimeException('<div class="alert">Invalid file format.</div>');
                    // }


                    // if (false === $ext = array_search(
                    //     $finfo->file($_FILES['uploaded_files']['tmp_name'][$i]),
                    //     array(
                    //         'jpg' => 'image/jpeg',
                    //         'png' => 'image/png',
                    //         'gif' => 'image/gif',
                    //         'pdf' => 'application/pdf',
                    //     ),
                    //     true
                    // )) {
                    //     throw new RuntimeException('<div class="alert">Invalid file format.</div>');
                    // }

                    $uploadfile = $_FILES['uploaded_files']['tmp_name'][$i];
                    $filename = $_FILES['uploaded_files']['name'][$i];
                }
            }