/**
* Check if memcache is available
*
* @param array $servers
* @return boolean
*/
function is_memcache_available($servers)
{
static $results = array();
$key = md5(implode('', $servers));
if (!isset($results[$key])) {
w3_require_once(W3TC_LIB_W3_DIR . '/Cache/Memcached.php');
@($memcached = new W3_Cache_Memcached(array('servers' => $servers, 'persistant' => false)));
$test_string = sprintf('test_' . md5(time()));
$test_value = array('content' => $test_string);
$memcached->set($test_string, $test_value, 60);
$test_value = $memcached->get($test_string);
$results[$key] = $test_value['content'] == $test_string;
}
return $results[$key];
}
