PHP性能优化大全
http://blog.sina.com.cn/s/blog_467eb8ca01015hd9.html
echo '<script type="text/javascript">console.warn(TimeDemo());</script>';
date_default_timezone_set('Asia/Shanghai');
echo '<script type="text/javascript">console.warn("'.date('Y-m-d H:i:s.ms',$_SERVER['REQUEST_TIME']).'");</script>';