render_block_core_categories() │ WP 1.0

Renders the core/categories block on server.

No Hooks.

Return

String. Returns the categories list/dropdown markup.

Usage

render_block_core_categories( $attributes );
$attributes(array) (required)
The block attributes.

Code of render_block_core_categories() WP 6.1.1

wp-includes/blocks/categories.php 
function render_block_core_categories( $attributes ) {
	static $block_id = 0;
	$block_id++;

	$args = array(
		'echo'         => false,
		'hierarchical' => ! empty( $attributes['showHierarchy'] ),
		'orderby'      => 'name',
		'show_count'   => ! empty( $attributes['showPostCounts'] ),
		'title_li'     => '',
		'hide_empty'   => empty( $attributes['showEmpty'] ),
	);
	if ( ! empty( $attributes['showOnlyTopLevel'] ) && $attributes['showOnlyTopLevel'] ) {
		$args['parent'] = 0;
	}

	if ( ! empty( $attributes['displayAsDropdown'] ) ) {
		$id                       = 'wp-block-categories-' . $block_id;
		$args['id']               = $id;
		$args['show_option_none'] = __( 'Select Category' );
		$wrapper_markup           = '<div %1$s><label class="screen-reader-text" for="' . esc_attr( $id ) . '">' . __( 'Categories' ) . '</label>%2$s</div>';
		$items_markup             = wp_dropdown_categories( $args );
		$type                     = 'dropdown';

		if ( ! is_admin() ) {
			// Inject the dropdown script immediately after the select dropdown.
			$items_markup = preg_replace(
				'#(?<=</select>)#',
				build_dropdown_script_block_core_categories( $id ),
				$items_markup,
				1
			);
		}
	} else {
		$wrapper_markup = '<ul %1$s>%2$s</ul>';
		$items_markup   = wp_list_categories( $args );
		$type           = 'list';
	}

	$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => "wp-block-categories-{$type}" ) );

	return sprintf(
		$wrapper_markup,
		$wrapper_attributes,
		$items_markup
	);
}