lass = ".is-style-$variation_name"; if ( ! $block_selector ) { return $variation_class; } $limit = 1; $selector_parts = explode( ',', $block_selector ); $result = array(); foreach ( $selector_parts as $part ) { $result[] = preg_replace_callback( '/((?::\([^)]+\))?\s*)([^\s:]+)/', function ( $matches ) use ( $variation_class ) { return $matches[1] . $matches[2] . $variation_class; }, $part, $limit ); } return implode( ',', $result ); } /** * Collects valid block style variations keyed by block type. * * @since 6.6.0 * * @return array Valid block style variations by block type. */ protected static function get_valid_block_style_variations() { $valid_variations = array(); foreach ( self::get_blocks_metadata() as $block_name => $block_meta ) { if ( ! isset( $block_meta['styleVariations'] ) ) { continue; } $valid_variations[ $block_name ] = array_keys( $block_meta['styleVariations'] ); } return $valid_variations; } }