custom-browser-cache.php

<?php

function custom_browser_cache(){
    $rules = '# Expires headers (for better cache control)' . PHP_EOL;
	  $rules .= '<IfModule mod_expires.c>' . PHP_EOL;
	  $rules .= 'ExpiresActive on' . PHP_EOL . PHP_EOL;
	  $rules .= '# Perhaps better to whitelist expires rules? Perhaps.' . PHP_EOL;
	  $rules .= 'ExpiresDefault                          "access plus 1 month"' . PHP_EOL . PHP_EOL;
	  $rules .= '# cache.appcache needs re-requests in FF 3.6 (thanks Remy ~Introducing HTML5)' . PHP_EOL;
	  $rules .= 'ExpiresByType text/cache-manifest       "access plus 0 seconds"' . PHP_EOL . PHP_EOL;
	  $rules .= '# Your document html' . PHP_EOL;
	  $rules .= 'ExpiresByType text/html                 "access plus 0 seconds"' . PHP_EOL . PHP_EOL;
	  $rules .= '# Data' . PHP_EOL;
	  $rules .= 'ExpiresByType text/xml                  "access plus 0 seconds"' . PHP_EOL;
	  $rules .= 'ExpiresByType application/xml           "access plus 0 seconds"' . PHP_EOL;
	  $rules .= 'ExpiresByType application/json          "access plus 0 seconds"' . PHP_EOL . PHP_EOL;
	  $rules .= '# Feed' . PHP_EOL;
	  $rules .= 'ExpiresByType application/rss+xml       "access plus 1 hour"' . PHP_EOL;
	  $rules .= 'ExpiresByType application/atom+xml      "access plus 1 hour"' . PHP_EOL . PHP_EOL;
	  $rules .= '# Favicon (cannot be renamed)' . PHP_EOL;
	  $rules .= 'ExpiresByType image/x-icon              "access plus 1 week"' . PHP_EOL . PHP_EOL;
	  $rules .= '# Media: images, video, audio' . PHP_EOL;
	  $rules .= 'ExpiresByType image/gif                 "access plus 1 month"' . PHP_EOL;
	  $rules .= 'ExpiresByType image/png                 "access plus 1 month"' . PHP_EOL;
	  $rules .= 'ExpiresByType image/jpeg                "access plus 1 month"' . PHP_EOL;
	  $rules .= 'ExpiresByType video/ogg                 "access plus 1 month"' . PHP_EOL;
	  $rules .= 'ExpiresByType audio/ogg                 "access plus 1 month"' . PHP_EOL;
	  $rules .= 'ExpiresByType video/mp4                 "access plus 1 month"' . PHP_EOL;
	  $rules .= 'ExpiresByType video/webm                "access plus 1 month"' . PHP_EOL . PHP_EOL;
	  $rules .= '# HTC files  (css3pie)' . PHP_EOL;
	  $rules .= 'ExpiresByType text/x-component          "access plus 1 month"' . PHP_EOL . PHP_EOL;
	  $rules .= '# Webfonts' . PHP_EOL;
	  $rules .= 'ExpiresByType application/x-font-ttf    "access plus 1 month"' . PHP_EOL;
	  $rules .= 'ExpiresByType font/opentype             "access plus 1 month"' . PHP_EOL;
	  $rules .= 'ExpiresByType application/x-font-woff   "access plus 1 month"' . PHP_EOL;
	  $rules .= 'ExpiresByType application/x-font-woff2  "access plus 1 month"' . PHP_EOL;
	  $rules .= 'ExpiresByType image/svg+xml             "access plus 1 month"' . PHP_EOL;
	  $rules .= 'ExpiresByType application/vnd.ms-fontobject "access plus 1 month"' . PHP_EOL . PHP_EOL;
	  $rules .= '# CSS and JavaScript' . PHP_EOL;
	  $rules .= 'ExpiresByType text/css                  "access plus 1 year"' . PHP_EOL;
	  $rules .= 'ExpiresByType application/javascript    "access plus 1 year"' . PHP_EOL . PHP_EOL;
	  $rules .= '</IfModule>' . PHP_EOL . PHP_EOL;
	  
	  retrun $rules;
}

add_filter('rocket_htaccess_mod_expires', 'custom_brower_cache');