1、开启Gzip
<ifmodule mod_deflate.c>
AddOutputFilterByType DEFLATE text/html text/css text/plain text/xml application/x-httpd-php application/x-javascript
</ifmodule>
2、缓存html 、html、php、txt等文档
<FilesMatch ".(html|htm|php|txt)$">
Header unset Pragma
Header unset ETag
FileETag None
Header set Cache-Control "max-age=600"
</FilesMatch>
3、缓存图片、JS、css等
<FilesMatch ".(gif|jpg|jpeg|png|ico|css|js)$">
Header unset Pragma
Header unset ETag
FileETag None
Header set Cache-Control "max-age=604800"
</FilesMatch>
但是，如果放了2和3，那么可能后台(/admin)也会出问题，那么就需要在admin目录下放置一个不允许缓存的
<FilesMatch ".(html|htm|php|txt)$">
Header unset ETag
FileETag None
Header set Cache-Control "no-cache, no-store, max-age=0, must-revalidate"
Header set Pragma "no-cache"
</FilesMatch>