Twig 1.x - Configuring cache to /tmp don't work - php

Question

If I configure Twig's cache to myapp/storage/cache and manually set the correct permissions it works, but configuring it to sys_get_temp_dir() (which returns /tmp) doesn't seem to work. File structure in /tmp remains the same, altough no error is triggered.
My block of code is like this:
// [...]
$app->register(new \Silex\Provider\TwigServiceProvider(), array(
'twig.path' => __DIR__ . '/templates',
'twig.options' => array(
'cache' => sys_get_temp_dir(), // If changed to myapp/storage/cache, it works.
),
));

Answer 1

I don't know if this can help you, but it is possible to override the default writeCacheFile method of the Twig_Environment. By doing so you can create the temporary folder yourself and apply the wanted permissions, so your user don't have to do this themself.
Custom Twig_Env
class Environment extends \Twig_Environment {
protected function writeCacheFile($file, $content){
createDirectoryTree(dirname($file));
parent::writeCacheFile($file, $content);
chmod($file,0664);
chgrp($file, 'psacln');
chown($file, 'www-data');
}
}
Functions.php
function createDirectoryTree($folder) {
if (is_dir($folder)) return;
$folder = str_replace('/', DIRECTORY_SEPARATOR, $folder);
$branches = explode(DIRECTORY_SEPARATOR, $folder);
$tree = '';
$old_mask = umask(0);
while(!empty($branches)) {
$tree .= array_shift($branches).DIRECTORY_SEPARATOR;
if (!#file_exists($tree)) {
if (#mkdir($tree, 0774)){
chown($tree, 'www-data');
chgrp($tree, 'psacln');
}
}
}
umask($old_mask);
}