function css2array($filename) {

    $css = file_get_contents($filename);

    $css = preg_replace('#/*(.*)*/#iu', '', $css);

 

    preg_match_all('#(.*){(.*)}#isU', $css, $matches);

    $cnt = sizeof($matches[1]);

    $array = array();

 

    for ($i = 1; $i < $cnt; $i++) {

        $elm = array_filter(explode(';', trim($matches[2][$i])));

        foreach($elm as $k => $v) {

            $keyval = explode(':', $v);

            $array[trim($matches[1][$i])][trim($keyval[0])] = trim($keyval[1]);

        }

    }

 

    return $array;

}

 

echo '<pre>' . print_r(css2array('style.css'), 1);