KnpSnappyBundle

Snappy is a PHP (5.6+) wrapper for the wkhtmltopdf conversion utility. It allows you to generate either pdf or image files from your html documents, using the webkit engine.

The KnpSnappyBundle provides a simple integration for your Symfony project.

Installation

With composer, require:

composer require knplabs/knp-snappy-bundle

Then enable it in your kernel (optional if you are using the Flex recipe with Symfony >= 4) :

// config/bundles.php
<?php

return [
    //...
    Knp\Bundle\SnappyBundle\KnpSnappyBundle::class => ['all' => true],
    //...
];

Configuration

If you need to change the binaries, change the instance options or even disable one or both services, you can do it through the configuration.

# app/config/config.yml (or config/packages/knp_snappy.yaml if using Symfony4 and the Flex recipe)
knp_snappy:
    pdf:
        enabled:    true
        binary:     /usr/local/bin/wkhtmltopdf #"\"C:\\Program Files\\wkhtmltopdf\\bin\\wkhtmltopdf.exe\"" for Windows users
        options:    []
    image:
        enabled:    true
        binary:     /usr/local/bin/wkhtmltoimage #"\"C:\\Program Files\\wkhtmltopdf\\bin\\wkhtmltoimage.exe\"" for Windows users
        options:    []

If you want to change temporary folder which is sys_get_temp_dir() by default, you can use

# app/config/config.yml (or config/packages/knp_snappy.yaml if using Symfony4 and the Flex recipe)
knp_snappy:
    temporary_folder: "%kernel.cache_dir%/snappy"

You can also configure the timeout used by the generators with process_timeout:

# app/config/config.yml (or config/packages/knp_snappy.yaml if using Symfony4 and the Flex recipe)
knp_snappy:
    process_timeout: 20 # In seconds

Usage

The bundle registers two services:

• the knp_snappy.image service allows you to generate images;
• the knp_snappy.pdf service allows you to generate pdf files.

Generate an image from a URL

// @var Knp\Snappy\Image
$knpSnappyImage->generate('http://www.google.fr', '/path/to/the/image.jpg');

Generate a pdf document from a URL

// @var Knp\Snappy\Pdf
$knpSnappyPdf->generate('http://www.google.fr', '/path/to/the/file.pdf');

Generate a pdf document from multiple URLs

// @var Knp\Snappy\Pdf
$knpSnappyPdf->generate(array('http://www.google.fr', 'http://www.knplabs.com', 'http://www.google.com'), '/path/to/the/file.pdf');

Generate a pdf document from a twig view

// @var Knp\Snappy\Pdf
$knpSnappyPdf->generateFromHtml(
    $this->renderView(
        'MyBundle:Foo:bar.html.twig',
        array(
            'some'  => $vars
        )
    ),
    '/path/to/the/file.pdf'
);

Render an image as response from a controller

use Knp\Bundle\SnappyBundle\Snappy\Response\JpegResponse;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;

class SomeController extends AbstractController
{
    public function imageAction(Knp\Snappy\Image $knpSnappyImage)
    {
        $html = $this->renderView('MyBundle:Foo:bar.html.twig', array(
            'some'  => $vars
        ));

        return new JpegResponse(
            $knpSnappyImage->getOutputFromHtml($html),
            'image.jpg'
        );
    }
}

Render a pdf document as response from a controller

use Knp\Bundle\SnappyBundle\Snappy\Response\PdfResponse;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;

class SomeController extends AbstractController
{
    public function pdfAction(Knp\Snappy\Pdf $knpSnappyPdf)
    {
        $html = $this->renderView('MyBundle:Foo:bar.html.twig', array(
            'some'  => $vars
        ));

        return new PdfResponse(
            $knpSnappyPdf->getOutputFromHtml($html),
            'file.pdf'
        );
    }
}

Render a pdf document with a relative url inside like css files

use Knp\Bundle\SnappyBundle\Snappy\Response\PdfResponse;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;

class SomeController extends AbstractController
{
    public function pdfAction(Knp\Snappy\Pdf $knpSnappyPdf)
    {
        $pageUrl = $this->generateUrl('homepage', array(), true); // use absolute path!

        return new PdfResponse(
            $knpSnappyPdf->getOutput($pageUrl),
            'file.pdf'
        );
    }
}

Maintainers

KNPLabs is looking for maintainers (see why).

If you are interested, feel free to open a PR to ask to be added as a maintainer.

We’ll be glad to hear from you :)

Credits

SnappyBundle and Snappy are based on the awesome wkhtmltopdf. SnappyBundle has been developed by KnpLabs.