public static function css($content) {
        $error = 'unknown';
        try {
            $minifier = new MatthiasMullie\Minify\CSS($content);
            return $minifier->minify();
        } catch (Exception $e) {
            $error = $e->getMessage();
        }

        $return = <<<EOD

/* Error: $error */
/* Problem detected during CSS minimisation, please review the following code */
/* ========================================================================== */


EOD;

        return $return.$content;
    }
public static function css($content) {
        $error = 'unknown';
        try {
            $minifier = new MatthiasMullie\Minify\CSS($content);
            return $minifier->minify();
        } catch (Exception $e) {
            $error = $e->getMessage();
        }

        $return = <<<EOD

/* Error: $error */
/* Problem detected during CSS minimisation, please review the following code */
/* ========================================================================== */


EOD;

        return $return.$content;
    }
public static function css ( $ content ) { $ error = 'unknown' ; try { $ minifier = new MatthiasMullie \ Minify \ CSS ( $ content ) ; return $ minifier -> minify ( ) ; } catch ( Exception $ e ) { $ error = $ e -> getMessage ( ) ; } $ return =  <<<EOD

/* Error: $error */
/* Problem detected during CSS minimisation, please review the following code */
/* ========================================================================== */


EOD ; return $ return . $ content ; }
Minify CSS code.

@param string $content
@return string minified CSS
Minify CSS code .