Schema filter

Hello!

If you just want the breadcrumbs, you can use this:
tsf()->breadcrumbs()->get_breadcrumb_list(); you’ll have to transform that list into a Schema, where url is the ListItem’s item, and name is name.

e.g.:

$list = tsf()->breadcrumbs()->get_breadcrumb_list();

$list_items = [];

foreach ( $list as $i => $item ) {
	$list_items[] = [
		'@type'    => 'ListItem',
		'position' => $i + 1, // Let's not create 0
		'item'     => sanitize_url( $item['url'] ),
		'name'     => tsf()->filter()->sanitize()->metadata_content( $item['name'] ),
	];
}

if ( $list_items ) 
	// Pop off the last URL, so search engines will use the page URL instead.
	unset( $list_items[ array_key_last( $list_items ) ]['item'] );

	$schema = [
		'@type'           => 'BreadcrumbList',
		'itemListElement' => $list_items,
	];
}

Note that you must wrap this in if ( function_exists( 'tsf' ) ) {} to prevent crashing when TSF is disabled.

Alternatively, you can use the filter below to augment TSF’s Schema.org output to only provide breadcrumbs — however, I cannot promise it’ll work forever since I never considered your type of request. Still, you’re free to reach out for an updated version if necessary.

add_filter(
	'the_seo_framework_schema_graph_data',
	function( $graph ) {

		foreach ( $graph as $entity ) {
			if ( isset( $entity['breadcrumb'] ) ) {
				return $entity['breadcrumb'];
			}
		}

		// Empty graph if there's no breadcrumb.
		return [];
	},
);

I hope this helps. Cheers!