DeviceDetector\Parser\Client\Browser::buildEngine PHP Method

    protected function buildEngine($engineData, $browserVersion)
    {
        $engine = '';
        // if an engine is set as default
        if (isset($engineData['default'])) {
            $engine = $engineData['default'];
        }
        // check if engine is set for browser version
        if (array_key_exists('versions', $engineData) && is_array($engineData['versions'])) {
            foreach ($engineData['versions'] as $version => $versionEngine) {
                if (version_compare($browserVersion, $version) >= 0) {
                    $engine = $versionEngine;
                }
            }
        }
        // try to detect the engine using the regexes
        if (empty($engine)) {
            $engineParser = new Engine();
            $engineParser->setUserAgent($this->userAgent);
            $engine = $engineParser->parse();
        }
        return $engine;
    }