WP_HTML_Processor::get_breadcrumbs(): string[]|null

Source

	$token_namespace        = $node->namespace ?? $this->get_namespace();
	$token_has_self_closing = $node->has_self_closing_flag ?? $this->has_self_closing_flag();

	return ! (
		// Comments, text nodes, and other atomic tokens.
		'#' === $token_name[0] ||
		// Doctype declarations.
		'html' === $token_name ||
		// Void elements.
		self::is_void( $token_name ) ||
		// Special atomic elements.
		( 'html' === $token_namespace && in_array( $token_name, array( 'IFRAME', 'NOEMBED', 'NOFRAMES', 'SCRIPT', 'STYLE', 'TEXTAREA', 'TITLE', 'XMP' ), true ) ) ||
		// Self-closing elements in foreign content.
		( 'html' !== $token_namespace && $token_has_self_closing )
	);
}

/**
 * Steps through the HTML document and stop at the next tag, if any.
 *
 * @since 6.4.0
 *
 * @throws Exception When unable to allocate a bookmark for the next token in the input HTML document.
 *
 * @see self::PROCESS_NEXT_NODE
 * @see self::REPROCESS_CURRENT_NODE
 *
 * @param string $node_to_process Whether to parse the next node or reprocess the current node.
 * @return bool Whether a tag was matched.
 */
public function step( $node_to_process = self::PROCESS_NEXT_NODE ): bool {
	// Refuse to proceed if there was a previous error.
	if ( null !== $this->last_error ) {
		return false;
	}

	if ( self::REPROCESS_CURRENT_NODE !== $node_to_process ) {
		/*
		 * Void elements still hop onto the stack of open elements even though
		 * there's no corresponding closing tag. This is important for managing
		 * stack-based operations such as "navigate to parent node" or checking

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