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<?php
	if (extension_loaded('zlib')) {
		ob_start('ob_gzhandler');
	}
	header ('content-type: text/css; charset: UTF-8');
	header ('cache-control: must-revalidate');
	$offset = 60 * 60;
	$expire = 'expires: ' . gmdate ('D, d M Y H:i:s', time() + $offset) . ' GMT';
	header ($expire);
	ob_start('compress');
	function compress($buffer) {
		/* remove comments */
		$buffer = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $buffer);
		/* remove tabs, spaces, newlines, etc. */
		$buffer = str_replace(array("\r\n", "\r", "\n", "\t"), '', $buffer);
		return $buffer;
	}
	/* css files for compression */
	include('minibasket.css');
	include('bootstrap.css');
	include('font-awesome.css');
	include('style.css');
	include('default.css');
  $etag = md5(ob_get_length());
  header('Etag: ' . $etag);
  if (trim($_SERVER['HTTP_IF_NONE_MATCH']) == $etag) {
    header('HTTP/1.1 304 Not Modified');
    exit;
  }
	if (extension_loaded('zlib')) {
		ob_end_flush();
	}
?>