wp_get_block_default_classname( string $block_name ): string

19function wp_get_block_default_classname( $block_name ) {20	// Generated HTML classes for blocks follow the `wp-block-{name}` nomenclature.21	// Blocks provided by WordPress drop the prefixes 'core/' or 'core-' (historically used in 'core-embed/').22	$classname = 'wp-block-' . preg_replace(23		'/^core-/',24		'',25		str_replace( '/', '-', $block_name )26	);27 28	/**29	 * Filters the default block className for server rendered blocks.30	 *31	 * @since 5.6.032	 *33	 * @param string $class_name The current applied classname.34	 * @param string $block_name The block name.35	 */36	$classname = apply_filters( 'block_default_classname', $classname, $block_name );37 38	return $classname;39}