‘Do download WP Super Cache plugin 99% of your visitors don’t do any of the above’
Editor’s Comment/ This plugin generates static html files from your dynamic WordPress blog. After a html file is generated your webserver will serve that file instead of processing the comparatively heavier and more expensive WordPress PHP scripts.
However, because a user’s details are displayed in the comment form after they leave a comment, the plugin will only serve static html files to:
- Users who are not logged in.
- Users who have not left a comment on your blog.
- Or users who have not viewed a password protected post.
The good news, is that probably more than 99% of your visitors don’t do any of the above! Those users who don’t see the static files will still benefit because they will see regular WP-Cache cached files and your server won’t be as busy as before. This plugin should help your server cope with a front page appearance on digg.com or other social networking site.
As this plugin is based on the older WP-Cache plugin you can switch off the Super Cache static html caching. Caching will still be performed, but every request will require loading the PHP engine. In normal circumstances this isn’t that bad, but if your server is underpowered, or you’re experiencing heavy traffic you may run into trouble. Super Cached html files will be server more quickly than PHP generated cached files so there’s very little reason not to use the Super Cache feature.
See the WP Super Cache homepage for further information.
The changelog is a good place to start if you want to know what has changed since you last downloaded the plugin.
WP Super Cache Installation
- You should have the Apache mod mime and mod rewrite modules installed and WordPress fancy permalinks enabled. PHP safe mode should be disabled. If any of those are missing or off you can still use the slower WP-Cache part of the plugin.
- If you have WP-Cache installed already, please disable it. Edit wp-config.php and make sure the WP_CACHE define is deleted, and remove the files wp-content/wp-cache-config.php and wp-content/advanced-cache.php. These will be recreated when you install this plugin.
- Upload this directory to your plugins directory. It will create a ‘wp-content/plugins/wp-super-cache/’ directory.
- If you are using WordPress MU you will need to install this in ‘wp-content/mu-plugins/wp-super-cache/’ and the file wp-cache.php must be copied into the mu-plugins directory.
- WordPress users should go to their Plugins page and activate “WP Super Cache”.
- Now go to Settings->WP Super Cache and enable caching. If you see an error message or a blank screen you may need to fix it. See the “FAQ” section later in this readme for instructions.
- mod_rewrite rules will be inserted into your .htaccess file. Look in your web root directory for this file. It should look similar to this:
- After you have enabled the plugin, look for the file “wp-content/cache/.htaccess”. If it’s not there you must create it. It should read:
# BEGIN supercache <IfModule mod_mime.c> AddEncoding gzip .gz AddType text/html .gz </IfModule> <IfModule mod_deflate.c> SetEnvIfNoCase Request_URI .gz$ no-gzip </IfModule> <IfModule mod_headers.c> Header set Cache-Control 'max-age=300, must-revalidate' </IfModule> <IfModule mod_expires.c> ExpiresActive On ExpiresByType text/html A300 </IfModule> # END supercache - Apache must be configured to allow the modules above. If you receive a “500 internal error” when serving requests to anonymous users you need to dig into your Apache configuration. This configuration in my virtual host works for me:
<Directory /home/www/> AllowOverride All </Directory>
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