block_core_tab_panel_render( array $attributes, string $content, WP_Block $block ): string

19function block_core_tab_panel_render( array $attributes, string $content, \WP_Block $block ): string {20	$tabs_id = $block->context['core/tabs-id'] ?? '';21 22	static $tab_counters = array();23 24	if ( ! isset( $tab_counters[ $tabs_id ] ) ) {25		$tab_counters[ $tabs_id ] = 0;26	}27 28	$tab_index = $tab_counters[ $tabs_id ];29	++$tab_counters[ $tabs_id ];30 31	$tag_processor = new WP_HTML_Tag_Processor( $content );32	$tag_processor->next_tag( array( 'class_name' => 'wp-block-tab-panel' ) );33 34	// Use the user's custom anchor if present, otherwise fall back to35	// the generated position-based ID.36	$tab_id = (string) $tag_processor->get_attribute( 'id' );37	if ( empty( $tab_id ) ) {38		$tab_id = ! empty( $tabs_id )39			? $tabs_id . '-tab-' . $tab_index40			: 'tab-' . $tab_index;41		$tag_processor->set_attribute( 'id', $tab_id );42	}43 44	$tag_processor->set_attribute( 'aria-labelledby', 'tab__' . $tab_id );45	$tag_processor->set_attribute( 'data-wp-bind--hidden', '!state.isActiveTab' );46 47	return (string) $tag_processor->get_updated_html();48}