= null)
    {
        $mode = 0666;
        $umask = umask();
        $filesystem = new Filesystem();
        $filesystem->dumpFile($this->file, $content, null);
        try {
            $filesystem->chmod($this->file, $mode, $umask);
        } catch (IOException $e) {
            // discard chmod failure (some filesystem may not support it)
        }

        if (null !== $metadata) {
            $filesystem->dumpFile($this->getMetaFile(), serialize($metadata), null);
            try {
                $filesystem->chmod($this->getMetaFile(), $mode, $umask);
            } catch (IOException $e) {
                // discard chmod failure (some filesystem may not support it)
            }
        }

        if (\function_exists('opcache_invalidate') && filter_var(ini_get('opcache.enable'), FILTER_VALIDATE_BOOLEAN)) {
            @opcache_invalidate($this->file, true);
        }
    }

    /**
     * Gets the meta file path.
     *
     * @return string The meta file path
     */
    private function getMetaFile()
    {
        return $this->file.'.meta';
    }
}
<br />
<b>Fatal error</b>:  Uncaught Error: Class 'Symfony\Component\Config\ResourceCheckerConfigCache' not found in /home/acumstiu/gpszone.ro/vendor/symfony/config/ConfigCache.php:32
Stack trace:
#0 /home/acumstiu/gpszone.ro/vendor/composer/ClassLoader.php(444): include()
#1 /home/acumstiu/gpszone.ro/vendor/composer/ClassLoader.php(322): Composer\Autoload\includeFile('/home/acumstiu/...')
#2 [internal function]: Composer\Autoload\ClassLoader-&gt;loadClass('Symfony\\Compone...')
#3 /home/acumstiu/gpszone.ro/phpbb/di/container_builder.php(141): spl_autoload_call('Symfony\\Compone...')
#4 /home/acumstiu/gpszone.ro/common.php(115): phpbb\di\container_builder-&gt;get_container()
#5 /home/acumstiu/gpszone.ro/memberlist.php(20): include('/home/acumstiu/...')
#6 {main}
  thrown in <b>/home/acumstiu/gpszone.ro/vendor/symfony/config/ConfigCache.php</b> on line <b>32</b><br />