Using the Form class in a Controller - http://www.symfonycentral.com

ArticleController.php

<?php 
use MyCompany\BlogBundle\Form\Type\ArticleType;
use MyCompany\BlogBundle\Entity\Article;

    /* ... rest of the controller */

    /**
     * @Route("/article/add", name="post_add")
     * @Template()
     */
    public function addAction()
    {
        $article = new Article();
        $form = $this->createForm(new ArticleType(), $article);

    /* ... rest of the controller */