How can I make a custom field type in symfony2?

Question

I want to make a custom form field in symfony2 named daterange, which will extends the default symfony date type form field and take date range(start date and e

Answer 1

In order to do that, you need to add the following lines into app/config/config.yml

twig:
    form:
        resources:
            - 'YourSuperBundle:Form:fields.html.twig'

then in src/Your/SuperBundle/Resources/views/Form/fields.html.twig:

{% extends 'form_div_layout.html.twig' %}

{% block daterange_widget %}
     ... do the customization.
{% endblock %}

For additional reference please read form customization of Symfony 2.0 book.