Symfony 2: Download multiple images files in a Zip one - php

Question

I'd like download multiple files in a zip but it doesn't work: the downloaded zip folder is still empty and is like opt/lampp/htdocs/MYPROJECT/... which one I'd like simple like /filename.zip
my controller, I just get all the file names from the DB and concatenate them with the directory name where they are physically saved:
$response = new Response();
// Get the entity manager
$em = $this->getDoctrine()->getManager();
//Collect all the result from the database and zip all the files related
$files = $em->getRepository('IballotCmsBundle:Result')->findAll();
$directory = __DIR__.'/../../../../web/uploads/pinkSheet';
//$directory = __DIR__.'/../temp/de.jpg';
$filename = 'all.zip';
$zip = new ZipArchive;
$zip->open($filename, ZipArchive::CREATE);
foreach ($files as $file) {
$zip->addFile($directory.'/'.$file->getImage());
}
$zip->close();
$response->headers->set('Cache-Control', 'private');
$response->headers->set('Content-type', mime_content_type($filename));
$response->headers->set('Content-Disposition', 'attachment; filename="' . basename($filename) . '"');
$response->headers->set('Content-length', filesize($filename));
// Send headers before outputting anything
$response->sendHeaders();
$response->setContent(readfile($filename));
return $response;

Answer 1

I think it has to do with this line of code:
$filename = 'all.zip';
$zip = new ZipArchive;
$zip->open($filename, ZipArchive::CREATE);
You are trying to create a zip file called all.zip but you haven't specified the actual path. $filename should probably be something like this:
$filename = '/absolute/path/to/all.zip'
As for the structure of the zip file you'll need to read the docs which has a great example:
$zip = new ZipArchive;
if ($zip->open('test.zip') === TRUE) {
$zip->addFile('/path/to/index.txt', 'newname.txt');
$zip->close();
echo 'ok';
} else {
echo 'failed';
}
This will add the /path/to/index.txt file to the test.zip with the name newname.txt instead of /path/to/index.txt. You can use the second argument to control the directory (have a look at the comments in the docs for more info)