futtta / autoptimize

        }

        // Minify each chunk

        for ($i = 0, $n = count($css_chunks); $i < $n; $i++) {

            $css_chunks[$i] = $this->minify($css_chunks[$i], $linebreak_pos);

            // Keep the first @charset at-rule found

            if (empty($charset) && preg_match($charset_regexp, $css_chunks[$i], $matches)) {

                $charset = strtolower($matches[1]) . $matches[2];

            }

            // Delete all @charset at-rules

            $css_chunks[$i] = preg_replace($charset_regexp, '', $css_chunks[$i]);

        }

        // Update the first chunk and push the charset to the top of the file.

        $css_chunks[0] = $charset . $css_chunks[0];

        }

        // Minify each chunk

        for ($i = 0, $n = count($cssChunks); $i < $n; $i++) {

            $cssChunks[$i] = $this->minify($cssChunks[$i], $linebreakPos);

            // Keep the first @charset at-rule found

            if (empty($charset) && preg_match($charsetRegexp, $cssChunks[$i], $matches)) {

                $charset = strtolower($matches[1]) . $matches[2];

            }

            // Delete all @charset at-rules

            $cssChunks[$i] = preg_replace($charsetRegexp, '', $cssChunks[$i]);

        }

        // Update the first chunk and push the charset to the top of the file.

        $cssChunks[0] = $charset . $cssChunks[0];