Nested Complex Fields

Complex fields can be nested.

The following will define a container that creates multiple slides and allows positioning of multiple text fragments on each slide:

use Carbon_Fields\Container;
use Carbon_Fields\Field;

Container::make( 'post_meta', 'Slider Data' )
    ->where( 'post_type', '=', 'post' )
    ->add_fields( array(
        Field::make( 'complex', 'crb_slides' )->add_fields( array(
            Field::make( 'image', 'image' ),
            Field::make( 'complex', 'slide_fragments' )
                ->add_fields( array(
                    Field::make( 'text', 'fragment_text' ),
                    Field::make( 'select', 'fragment_position' )
                        ->add_options( array('Top Left', 'Top Right', "Bottom Left", "Bottom Right") ),
                ))
        )),
    ));

Complex field values are retrieved using either carbon_get_post_meta() or carbon_get_theme_option() (or a different retrieval function, depending on the container it is added to).

The format of the returned data is a multi-dimensional array, as follows:

array (
    0 => array (
        'photo' => 'http://example.com/lorem.jpg',
        'people_on_photo' => array (
            0 => array (
                'name' => 'John',
            ),
            1 => array (
                'name' => 'Karen',
            ),
        )
    ),
    1 => array (
        'photo' => 'http://example.com/ipsum.jpg',
        'people_on_photo' => array (
            0 => array (
                'name' => 'Paul',
            ),
            1 => array (
                'name' => 'Kasper',
            ),
            2 => array (
                'name' => 'Julie',
            ),
        )
    ),
)