// in filenames, we limit to A-z/0-9
$filename = preg_replace('/[^A-Za-z0-9\-]/', '', $entry->getTitle());
- $titlepage = $content_start . "<h1>".$entry->getTitle()."</h1>" . $this->getExportInformation('PHPePub') . $bookEnd;
- $book->addChapter("Title", 'Title.html', $titlepage, true, EPub::EXTERNAL_REF_ADD);
+ $titlepage = $content_start . '<h1>' . $entry->getTitle() . '</h1>' . $this->getExportInformation('PHPePub') . $bookEnd;
+ $book->addChapter('Title', 'Title.html', $titlepage, true, EPub::EXTERNAL_REF_ADD);
$chapter = $content_start . $entry->getContent() . $bookEnd;
$book->addChapter($entry->getTitle(), htmlspecialchars($filename) . '.html', $chapter, true, EPub::EXTERNAL_REF_ADD);
}