If you are comfortable getting into your WP theme code, I recommend just using
PHP's APC Cache. For instance, in your header.php file where Wordpress inserts
your header, you could slightly modify it using an if/else statement that tests
whether the nav menu is stored in the cache. If it is already cached, it loads
the cached copy. If it isn't cached, it runs the typical WP function for
fetching the nav menu, loads it, and then stores it in the cache for next time.
Something like this:
<?php
if(!empty(apc_fetch('navmenu'))){
echo apc_fetch('nav_menu'); //echo the cached copy
}else{
wp_nav_menu( array( 'theme_location' => 'primary', 'menu_class' =>
'nav-menu' ) ); //load the menu
apc_store('nav_menu', wp_nav_menu( array( 'theme_location' =>
'primary', 'menu_class' => 'nav-menu', 'echo'=>false ) );
}
?>
You could do the exact same thing for all the other elements you want to cache.
This is extremely granular and works very well.
Note that you may have to enable PHP APC manually on your server for this to
work.
Josh Welker
-----Original Message-----
From: Code for Libraries [mailto:[email protected]] On Behalf Of
Wilhelmina Randtke
Sent: Tuesday, May 28, 2013 4:30 PM
To: [email protected]
Subject: [CODE4LIB] Wordpress: Any way to selectively control caching for
content areas on a page?
In a Wordpress site, is there a way to allow site-wide caching, but force
certain areas of a page to reload on each visit?
For example, if on a specific page there is a huge navigational menu that
never changes, a map that rarely changes, and hours of operation which change
frequently (as often as holidays), is there a way to force only the hours of
operation to reload when a person revisits the page?
-Wilhelmina Randtke
