set_post_format() WordPress Function

function set_post_format( $post, $format ) {
	$post = get_post( $post );

	if ( ! $post ) {
		return new WP_Error( 'invalid_post', __( 'Invalid post.' ) );
	}

	if ( ! empty( $format ) ) {
		$format = sanitize_key( $format );
		if ( 'standard' === $format || ! in_array( $format, get_post_format_slugs(), true ) ) {
			$format = '';
		} else {
			$format = 'post-format-' . $format;
		}
	}

	return wp_set_post_terms( $post->ID, $format, 'post_format' );
}
Uses	Description
wp-includes/l10n.php:__()	Retrieve the translation of $text.
wp-includes/formatting.php:sanitize_key()	Sanitizes a string key.
wp-includes/post.php:wp_set_post_terms()	Set the terms for a post.
wp-includes/post.php:get_post()	Retrieves post data given a post ID or post object.
wp-includes/post-formats.php:get_post_format_slugs()	Retrieves the array of post format slugs.
wp-includes/class-wp-error.php:WP_Error::__construct()	Initializes the error.
Used By	Description
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php:WP_REST_Posts_Controller::create_item()	Creates a single post.
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php:WP_REST_Posts_Controller::update_item()	Updates a single post.
wp-admin/includes/post.php:edit_post()	Updates an existing post with values provided in `$_POST`.
wp-admin/includes/post.php:bulk_edit_posts()	Processes the post data for the bulk editing of posts.
wp-admin/includes/post.php:get_default_post_to_edit()	Returns default post information to use when populating the “Write Post” form.
wp-includes/class-wp-xmlrpc-server.php:wp_xmlrpc_server::mw_editPost()	Edit a post.
wp-includes/class-wp-xmlrpc-server.php:wp_xmlrpc_server::mw_newPost()	Create a new post.
wp-includes/class-wp-xmlrpc-server.php:wp_xmlrpc_server::_insert_post()	Helper method for wp_newPost() and wp_editPost(), containing shared logic.