Multiple application in EzPublishKernel

gistfile1.txt

class EzPublishKernel extends Kernel
{
    public function registerBundles()
    {
        $bundles = array(
            // all the bundles
        );

        $app = $this->getApp();
        if ($app == 'backend') {
          $bundles[] = 'SRF\\BackendBundle';
        }
        
        // environment dependendet bundles

        return $bundles;
    }

    public function getCacheDir()
    {
        return $this->rootDir.'/cache/'.$this->environment.'/'.$this->getApp();
    }

    /**
     * {@inheritdoc}
     */
    public function getLogDir()
    {
        return $this->rootDir.'/logs/'.$this->getApp();
    }

    /**
     * Parsing the domain and uri and returns the app
     *
     * @return string
     */
    private function getApp()
    {
        $app = 'frontend';
        
        if ($SERVER['HTTP_HOST'] == 'backend.srf.ch') {
          $app = 'backend';
        }
        return $app;
    }

    /**
     * {@inheritdoc}
     */
    public function getName()
    {
        return $this->getApp();
    }
}