ProjectConfiguration.php

<?php

require_once dirname(__FILE__).'/../lib/vendor/symfony/lib/autoload/sfCoreAutoload.class.php';
sfCoreAutoload::register();

class ProjectConfiguration extends sfProjectConfiguration
{
  public function setup()
  {
    $this->enablePlugins('sfDoctrinePlugin');
    
    $this->dispatcher->connect('view.configure_format', array('MyExcel', 'setFormat'));
    $this->dispatcher->connect('response.filter_content', array('MyExcel', 'setContent'));
  }
}