@johnWebberDec 12.2011 — #There a different ways to cache browsers now a days, most are done with apache and others are headers send with php. Here's an example with .htaccess taken from the html5boilerplate
# These are pretty far-future expires headers. # They assume you control versioning with cachebusting query params like # <script src="application.js?20100608"> # Additionally, consider that outdated proxies may miscache # www.stevesouders.com/blog/2008/08/23/revving-filenames-dont-use-querystring/
# If you don't use filenames to version, lower the CSS and JS to something like # "access plus 1 week" or so.
<IfModule mod_expires.c> ExpiresActive on
# Perhaps better to whitelist expires rules? Perhaps. ExpiresDefault "access plus 1 month"
# cache.appcache needs re-requests in FF 3.6 (thanks Remy ~Introducing HTML5) ExpiresByType text/cache-manifest "access plus 0 seconds"
# Your document html ExpiresByType text/html "access plus 0 seconds"
# Data ExpiresByType text/xml "access plus 0 seconds" ExpiresByType application/xml "access plus 0 seconds" ExpiresByType application/json "access plus 0 seconds"
# Feed ExpiresByType application/rss+xml "access plus 1 hour" ExpiresByType application/atom+xml "access plus 1 hour"
# Favicon (cannot be renamed) ExpiresByType image/x-icon "access plus 1 week"
# Media: images, video, audio ExpiresByType image/gif "access plus 1 month" ExpiresByType image/png "access plus 1 month" ExpiresByType image/jpg "access plus 1 month" ExpiresByType image/jpeg "access plus 1 month" ExpiresByType video/ogg "access plus 1 month" ExpiresByType audio/ogg "access plus 1 month" ExpiresByType video/mp4 "access plus 1 month" ExpiresByType video/webm "access plus 1 month"
# HTC files (css3pie) ExpiresByType text/x-component "access plus 1 month"
# Webfonts ExpiresByType font/truetype "access plus 1 month" ExpiresByType font/opentype "access plus 1 month" ExpiresByType application/x-font-woff "access plus 1 month" ExpiresByType image/svg+xml "access plus 1 month" ExpiresByType application/vnd.ms-fontobject "access plus 1 month"
# CSS and JavaScript ExpiresByType text/css "access plus 1 year" ExpiresByType application/javascript "access plus 1 year"