Memcached provides a controlled, server based memory caching service. The server is reasonably easily configured and installed, but provides a sophisticated caching configuration. PHP support for the library is available through the PHP PEAR memcache library.

For larger environments, distributed Memcache hosts can be specified.

$db = NewADOConnection($driver='mysqli');
/*
* Enable memcache
*/
$db->memCache = true;
/*
* Add one or more servers, for use in distributed systems
*/
$db->memCacheHost = array('192.168.0.78', '192.168.0.79', '192.168.0.80'); 
/*
* Optionally add the server port if it differs from the default
*/
$db->memCachePort = 11211;
/*
* Use 'true' to store the item compressed (uses zlib)
*/
$db->memCacheCompress = false; 
 
/*
* We connect to the database, not the memcache server
*/
$db->Connect('localhost','mysql-user','mysql-password','employees');