open('feeds.epub', ZipArchive::CREATE);
// Create the required directory structure
$epub->addEmptyDir('META-INF');
$epub->addEmptyDir('OEBPS');
// Create the container.xml file
$containerXml = '
';
$epub->addFromString('META-INF/container.xml', $containerXml);
// Create the content.opf file
$contentOpf = '
'.$filename.'
Author Name
urn:uuid:12345678-1234-1234-1234-123456789012
en
';
$contentHtml .= htmlspecialchars($output, ENT_QUOTES, 'UTF-8');
$contentHtml .= '
';
$epub->addFromString('OEBPS/content.html', $contentHtml);
// Close the EPUB file
$epub->close();
// Download the EPUB file
header('Content-Type: application/epub+zip');
header('Content-Disposition: attachment; filename="' . $filename . '"');
header('Content-Length: ' . filesize('feeds.epub'));
readfile('feeds.epub');
exit;
?>