Contao\CoreBundle\Cache\ContaoCacheWarmer::generateLanguageCache PHP Method

    private function generateLanguageCache($cacheDir)
    {
        $dumper = new CombinedFileDumper($this->filesystem, new DelegatingLoader(new LoaderResolver([new PhpFileLoader(), new XliffFileLoader($this->rootDir)])), $cacheDir . '/contao');
        $dumper->setHeader("<?php\n");
        foreach ($this->getLanguagesInUse() as $language) {
            $processed = [];
            try {
                $files = $this->finder->findIn('languages/' . $language)->files()->name('/\\.(php|xlf)$/');
            } catch (\InvalidArgumentException $e) {
                continue;
                // the language does not exist
            }
            /** @var SplFileInfo[] $files */
            foreach ($files as $file) {
                $name = substr($file->getBasename(), 0, -4);
                if (in_array($name, $processed)) {
                    continue;
                }
                $processed[] = $name;
                $subfiles = $this->finder->findIn('languages/' . $language)->files()->name('/^' . $name . '\\.(php|xlf)$/');
                try {
                    $dumper->dump(iterator_to_array($subfiles), sprintf('languages/%s/%s.php', $language, $name), ['type' => $language]);
                } catch (\OutOfBoundsException $e) {
                    continue;
                }
            }
        }
    }