add_post_type_support() WP 1.0

Register 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, and the 'comments' feature dictates whether the comments count will show on the edit screen.

No Hooks.

Return

Nothing (null).

Usage

add_post_type_support( $post_type, $feature );

$post_type(string) (required)

The post type for which to add the feature.

$feature(string/array) (required)

The feature being added, accepts an array of feature strings or a single string.

Code of add post type support: wp-includes/post.php ^{WP 5.2.1}

<?php
function add_post_type_support( $post_type, $feature ) {
	global $_wp_post_type_features;

	$features = (array) $feature;
	foreach ( $features as $feature ) {
		if ( func_num_args() == 2 ) {
			$_wp_post_type_features[ $post_type ][ $feature ] = true;
		} else {
			$_wp_post_type_features[ $post_type ][ $feature ] = array_slice( func_get_args(), 2 );
		}
	}
}

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From tag: Custom post type (post_type)

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