PEAR_Config::_lazyChannelSetup PHP Method

    function _lazyChannelSetup($uselayer = false)
    {
        if ($this->_noRegistry) {
            return;
        }
        $merge = false;
        foreach ($this->_registry as $layer => $p) {
            if ($uselayer && $uselayer != $layer) {
                continue;
            }
            if (!$this->_regInitialized[$layer]) {
                if ($layer == 'default' && isset($this->_registry['user']) || isset($this->_registry['system'])) {
                    // only use the default registry if there are no alternatives
                    continue;
                }
                if (!is_object($this->_registry[$layer])) {
                    if ($phpdir = $this->get('php_dir', $layer, 'pear.php.net')) {
                        $this->_registry[$layer] =& new PEAR_Registry($phpdir);
                        $this->_registry[$layer]->setConfig($this, false);
                        $this->_regInitialized[$layer] = false;
                    } else {
                        unset($this->_registry[$layer]);
                        return;
                    }
                }
                $this->setChannels($this->_registry[$layer]->listChannels(), $merge);
                $this->_regInitialized[$layer] = true;
                $merge = true;
            }
        }
    }