image resize zf2 - zend-framework2

Question

I need to implement image resize functionality (preferably with gd2 library extension) in zend framework 2.
I could not find any component/helper for the same. Any references?
If i want to create one, where should I add it. In older Zend framework, there was a concept of Action Helper, what about Zend framework 2 ?
Please suggest the best solution here.

Answer 1

I currently use Imagine together with Zend Framework 2 to handle this.
Install Imagine: php composer.phar require imagine/Imagine:0.3.*
Create a service factory for the Imagine service (in YourModule::getServiceConfig):
return array(
'invokables' => array(
// defining it as invokable here, any factory will do too
'my_image_service' => 'Imagine\Gd\Imagine',
),
);
Use it in your logic (hereby a small example with a controller):
public function imageAction()
{
$file = $this->params('file'); // #todo: apply STRICT validation!
$width = $this->params('width', 30); // #todo: apply validation!
$height = $this->params('height', 30); // #todo: apply validation!
$imagine = $this->getServiceLocator()->get('my_image_service');
$image = $imagine->open($file);
$transformation = new \Imagine\Filter\Transformation();
$transformation->thumbnail(new \Imagine\Image\Box($width, $height));
$transformation->apply($image);
$response = $this->getResponse();
$response->setContent($image->get('png'));
$response
->getHeaders()
->addHeaderLine('Content-Transfer-Encoding', 'binary')
->addHeaderLine('Content-Type', 'image/png')
->addHeaderLine('Content-Length', mb_strlen($imageContent));
return $response;
}
This is obviously the "quick and dirty" way, since you should do following (optional but good practice for re-usability):
probably handle image transformations in a service
retrieve images from a service
use an input filter to validate files and parameters
cache output (see http://zend-framework-community.634137.n4.nabble.com/How-to-handle-404-with-action-controller-td4659101.html eventually)
Related: Zend Framework - Returning Image/File using Controller

Answer 2

Use a service for this and inject it to controllers needing the functionality.

Answer 3

Here is a module called WebinoImageThumb in Zend Framework 2. Checkout this. It has some great feature such as -
Image Resize
Image crop, pad, rotate, show and save images
Create image reflection

Answer 4

For those who are unable to integrate Imagine properly like me..
I found another solution WebinoImageThumb here which worked perfectly fine with me. Here is little explanation if you don't want to read full documentation :
Run: php composer.phar require webino/webino-image-thumb:dev-develop
and add WebinoImageThumb as active module in config/application.config.php which further looks like :
<?php
return array(
// This should be an array of module namespaces used in the application.
'modules' => array(
'Application',
'WebinoImageThumb'
),
.. below remains the same
Now in your controller action use this through service locator like below :
// at top on your controller
use Zend\Validator\File\Size;
use Zend\Validator\File\ImageSize;
use Zend\Validator\File\IsImage;
use Zend\Http\Request
// in action
$file = $request->getFiles();
$fileAdapter = new \Zend\File\Transfer\Adapter\Http();
$imageValidator = new IsImage();
if ($imageValidator->isValid($file['file_url']['tmp_name'])) {
$fileParts = explode('.', $file['file_url']['name']);
$filter = new \Zend\Filter\File\Rename(array(
"target" => "file/path/to/image." . $fileParts[1],
"randomize" => true,
));
try {
$filePath = $filter->filter($file['file_url'])['tmp_name'];
$thumbnailer = $this->getServiceLocator()
->get('WebinoImageThumb');
$thumb = $thumbnailer->create($filePath, $options = [], $plugins = []);
$thumb->adaptiveResize(540, 340)->save($filePath);
} catch (\Exception $e) {
return new ViewModel(array('form' => $form,
'file_errors' => array($e->getMessage())));
}
} else {
return new ViewModel(array('form' => $form,
'file_errors' => $imageValidator->getMessages()));
}
Good luck..!!

Answer 5

In order to resize uploaded image on the fly you should do this:
public function imageAction()
{
// ...
$imagine = $this->getImagineService();
$size = new \Imagine\Image\Box(150, 150);
$mode = \Imagine\Image\ImageInterface::THUMBNAIL_INSET;
$image = $imagine->open($destinationPath);
$image->thumbnail($size, $mode)->save($destinationPath);
// ...
}
public function getImagineService()
{
if ($this->imagineService === null)
{
$this->imagineService = $this->getServiceLocator()->get('my_image_service');
}
return $this->imagineService;
}