Horde_Memcache::_init PHP Method

    public function _init()
    {
        if (class_exists('Memcached')) {
            if (empty($this->_params['persistent'])) {
                $this->_memcache = new Memcached();
            } else {
                $this->_memcache = new Memcached('horde_memcache');
            }
            $this->_params['large_items'] = false;
            $this->_memcache->setOptions(array(Memcached::OPT_COMPRESSION => $this->_params['compression'], Memcached::OPT_DISTRIBUTION => Memcached::DISTRIBUTION_CONSISTENT, Memcached::OPT_HASH => Memcached::HASH_MD5, Memcached::OPT_LIBKETAMA_COMPATIBLE => true, Memcached::OPT_PREFIX_KEY => $this->_params['prefix']));
        } else {
            // Force consistent hashing
            ini_set('memcache.hash_strategy', 'consistent');
            $this->_memcache = new Memcache();
        }
        for ($i = 0, $n = count($this->_params['hostspec']); $i < $n; ++$i) {
            if ($this->_memcache instanceof Memcached) {
                $res = $this->_memcache->addServer($this->_params['hostspec'][$i], empty($this->_params['port'][$i]) ? 0 : $this->_params['port'][$i], !empty($this->_params['weight'][$i]) ? $this->_params['weight'][$i] : 0);
            } else {
                $res = $this->_memcache->addServer($this->_params['hostspec'][$i], empty($this->_params['port'][$i]) ? 0 : $this->_params['port'][$i], !empty($this->_params['persistent']), !empty($this->_params['weight'][$i]) ? $this->_params['weight'][$i] : 1, 1, 15, true, array($this, 'failover'));
            }
            if ($res) {
                $this->_servers[] = $this->_params['hostspec'][$i] . (!empty($this->_params['port'][$i]) ? ':' . $this->_params['port'][$i] : '');
            }
        }
        /* Check if any of the connections worked. */
        if (empty($this->_servers)) {
            throw new Horde_Memcache_Exception('Could not connect to any defined memcache servers.');
        }
        if ($this->_memcache instanceof Memcache && !empty($this->_params['c_threshold'])) {
            $this->_memcache->setCompressThreshold($this->_params['c_threshold']);
        }
        if (isset($this->_params['logger'])) {
            $this->_logger = $this->_params['logger'];
            $this->_logger->log('Connected to the following memcache servers:' . implode($this->_servers, ', '), 'DEBUG');
        }
    }