Cacher is the code snippet organizer for pro developers

                $pdf_download_arr  = get_field('pdf_download');
                $pdf_download_link = $pdf_download_arr['url'];
                $pdf_filesize      = size_format(filesize(get_attached_file($pdf_download_arr['id'])));
                $pdf_filetype      = wp_check_filetype($pdf_download_arr['url']);
                $pdf_filetype      = strtolower($pdf_filetype['ext']);

                if (!empty($pdf_download_arr)) {
                    ?>
                    <a class="c-button" href="<?php echo $pdf_download_link; ?>" title="Download PDF" target="_blank">Download PDF
                        [<?php echo $pdf_filesize; ?>]</a>
                    <?php
                }