public function serverWarnings($driver = ''): Collection
    {
        $warnings = Collection::make([
            $this->databaseDriverWarnings($driver),
            $this->checkPhpExtension('curl'),
            $this->checkPhpExtension('gd'),
            $this->checkPhpExtension('simplexml'),
            $this->checkPhpIni('file_uploads', true),
            $this->checkSystemTemporaryFolder(),
            $this->checkPhpVersion(),
        ]);

        return $warnings
            ->flatten()
            ->filter();
    }