rmrevin\yii\minify\components\CSS::expandImports PHP Метод

    protected function expandImports(&$code)
    {
        if (true === $this->view->expand_imports) {
            preg_match_all('|\\@import\\s([^;]+);|is', str_replace('&', '&', $code), $m);
            if (!empty($m[0])) {
                foreach ($m[0] as $k => $v) {
                    $import_url = $m[1][$k];
                    if (!empty($import_url)) {
                        $import_content = $this->_getImportContent($import_url);
                        if (!empty($import_content)) {
                            $code = str_replace($m[0][$k], $import_content, $code);
                        }
                    }
                }
            }
        }
    }