经测试代码如下：
/**
* Gzip压缩JS、CSS代码
*
* @param
* @arrange (512.笔记) jb51.cc
**/
ob_start ("ob_gzhandler");
header("Content-type: text/javascript; charset: UTF-8");
header("Cache-Control: must-revalidate");
$offset = 60 * 60 ;
$ExpStr = "Expires: " .
gmdate("D,d M Y H:i:s",time() + $offset) . " GMT";
header($ExpStr);