gistfile1.php

<?php

// This is output <input type="email" />
$builder->add('email', 'email');

// This is output <input type="text" />
$builder->add('email', null);

// This is output <input type="tel" />
$builder->add('phone', null, array(
    'attr' => array(
        'type' => 'tel'
    )
));