PEAR_Downloader::_checkDepTree PHP Метод

    function _checkDepTree($channel, $package, $b, $checked = array())
    {
        $checked[$channel][$package] = true;
        if (!isset($this->_depTree[$channel][$package])) {
            return false;
        }
        if (isset($this->_depTree[$channel][$package][strtolower($b->getChannel())][strtolower($b->getPackage())])) {
            return true;
        }
        foreach ($this->_depTree[$channel][$package] as $ch => $packages) {
            foreach ($packages as $pa => $true) {
                if ($this->_checkDepTree($ch, $pa, $b, $checked)) {
                    return true;
                }
            }
        }
        return false;
    }