Description
Registers support of certain features for a post type.All core features are directly associated with a functional area of the edit
screen, such as the editor or a meta box. Features include: 'title', 'editor',
'comments', 'revisions', 'trackbacks', 'author', 'excerpt', 'page-attributes',
'thumbnail', 'custom-fields', and 'post-formats'.
Additionally, the 'revisions' feature dictates whether the post type will
store revisions, the 'autosave' feature dictates whether the post type
will be autosaved, and the 'comments' feature dictates whether the comments
count will show on the edit screen.
A third, optional parameter can also be passed along with a feature to provide
additional information about supporting that feature.
Example usage:
add_post_type_support( 'my_post_type', 'comments' );
add_post_type_support( 'my_post_type', array(
'author', 'excerpt',
) );
add_post_type_support( 'my_post_type', 'my_feature', array(
'field' => 'value',
) );