Multiple groups

To add multiple groups of fields you use add_fields( $name, $fields ), where:

$name

Unique name of the group.

$fields

Numeric array of fields.

Field::make( 'complex', 'crb_job' )
    ->add_fields( 'driver', array(
        Field::make( 'text', 'name' ),
        Field::make( 'text', 'drivers_license_id' ),
    ))
    ->add_fields( 'teacher', array(
        Field::make( 'image', 'name' ),
        Field::make( 'image', 'years_of_experience' ),
    ))

Each call to add_fields( $name, $fields ) creates a new group and adds it to the complex field.

You can also give each group a label different from their name using add_fields( $name, $label, $fields ).

All data stored in a complex field is returned as a two-dimensional array with the following format:

array (
    0 => array (
        '_type' => 'photograph',
        'caption' => 'Lorem Ipsum',
        'image' => 'http://example.com/wp-content/uploads/2012/12/Jellyfish.jpg',
    ),
    1 => array (
        '_type' => 'movie',
        'length' => '1:56',
        'title' => 'Dolor sit amet',
        'video' => 'http://example.com/wp-content/uploads/2012/12/video_new.mp4',
    ),
    2 => array (
        '_type' => 'photograph',
        'caption' => 'Consectetur adipiscing elit',
        'image' => 'http://example.com/wp-content/uploads/2012/12/Koala.jpg',
    ),
)

Each item represents the values stored by a single group. The name of the group is stored in element with key _type. When the complex field contains one group only, it’s type will be an empty string – "".

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) and passing the string "complex" as $type argument.