README

A simple library to generate EPUB files.

Usage

$coverImage = new \Tekkcraft\EpubGenerator\EpubAsset('path/to/image-folder', 'cover.png', 'image/png');

$generator = new \Tekkcraft\EpubGenerator\EpubDocument('book', 'TekkCraft', 'unique-book-name', '/path/to/storage-directory', $coverImage);

$css = new EpubAsset(
    'path/to/css-folder',
    'epub.css',
    'text/css',
);
$generator->addCss($css);

$sectionOne = new \Tekkcraft\EpubGenerator\EpubSection(
    'section1',
    'Section 1',
    '<h1>Chapter 1</h1><p class="some-css-class">This is the content of Chapter 1.</p>',
);
$generator->addSection($sectionOne);

$image = new \Tekkcraft\EpubGenerator\EpubAsset('path/to/image-folder', 'image.png', 'image/png');
$generator->addImage($image);

$sectionTwo = new \Tekkcraft\EpubGenerator\EpubSection(
    'section2',
    'Section 2',
    '<h1>Chapter 2</h1><p>This is the content of Chapter 2.</p><img src="../img/image.png" />',
);
$generator->addSection($sectionTwo);

$epubFile = $generator->generateEpub();

This would create a new EPUB file named book.epub in the directory /path/to/storage-directory. The $epubFile contains the file name of the generated EPUB.

All images are saved in the img folder and can be accessed using img/image-name.png.
All CSS assets are saved in the css folder and can be accessed using css/file-name.css.

All sections will be saved into the xhtml directory, meaning if you want to reference an image from one of your sections, you will need to call it in your HTML using ../img/my-image.png.

Required headers for download

If you want to provide your EPUB file as a download, add these headers:

header('Content-Type: application/epub+zip');
header(sprintf('Content-Disposition: attachment; filename="%s.epub"', 'my-ebook'));
header(sprintf('Content-Length: %s', strlen($epubFile)));

Validating an EPUB file

To validate an epub file, you can use the epubcheck tool provided by w3c.
I did not include this in my repository as it is a .jar file and therefore needs Java to run. In addition to that, you will probably have to use PHP's exec() function to call it, which is generally unsafe.

(It is, however downloaded when running the test suite, as this should not happen on a production system)

Testing

In order to run the PHPUnit test suite you will need to have java installed on your system in order to use the epubcheck.jar. The epubcheck.jar will be downloaded from https://github.com/w3c/epubcheck and saved into the sys_get_temp_dir() on first test execution.