/**
* Writes an asset collection to a cache file, optionally applies filters.
*
* @param AssetCollection $assets
* @param string $file
* @param array $filters
* @return string|false
*/
protected function doCache(AssetCollection $assets, $file, $filters = [])
{
$filters = $this->filters->get($filters);
if (count($assets)) {
$salt = array_merge([$_SERVER['SCRIPT_NAME']], array_keys($filters));
$file = preg_replace('/(.*?)(\\.[^\\.]+)?$/i', '$1-' . $assets->hash(implode(',', $salt)) . '$2', $file, 1);
if (!file_exists($file)) {
file_put_contents($file, $assets->dump($filters));
}
return $file;
}
return false;
}
