butes to render on the block wrapper. * @return string String of HTML attributes. */ function get_block_wrapper_attributes( $extra_attributes = array() ) { $new_attributes = WP_Block_Supports::get_instance()->apply_block_supports(); if ( empty( $new_attributes ) && empty( $extra_attributes ) ) { return ''; } // Attribute values are concatenated or overridden depending on the attribute type. // This is hardcoded on purpose, as we only support a fixed list of attributes. $attribute_merge_callbacks = array( 'style' => static function ( $new_attribute, $extra_attribute ) { $styles = array_filter( array( rtrim( trim( $new_attribute ), ';' ), rtrim( trim( $extra_attribute ), ';' ), ) ); return safecss_filter_attr( implode( ';', array_filter( $styles ) ) ); }, 'class' => static function ( $new_attribute, $extra_attribute ) { $classes = array_merge( (array) preg_split( '/\s+/', $extra_attribute, -1, PREG_SPLIT_NO_EMPTY ), (array) preg_split( '/\s+/', $new_attribute, -1, PREG_SPLIT_NO_EMPTY ) ); $classes = array_unique( array_filter( $classes ) ); return implode( ' ', $classes ); }, 'id' => static function ( $new_attribute, $extra_attribute ) { return '' !== $extra_attribute ? $extra_attribute : $new_attribute; }, 'aria-label' => static function ( $new_attribute, $extra_attribute ) { return '' !== $extra_attribute ? $extra_attribute : $new_attribute; }, ); $attributes = array(); foreach ( $attribute_merge_callbacks as $attribute_name => $merge_callback ) { $new_attribute = $new_attributes[ $attribute_name ] ?? ''; $extra_attribute = $extra_attributes[ $attribute_name ] ?? ''; $new_attribute = is_string( $new_attribute ) ? $new_attribute : ''; $extra_attribute = is_string( $extra_attribute ) ? $extra_attribute : ''; if ( '' === $new_attribute && '' === $extra_attribute ) { continue; } $attributes[ $attribute_name ] = $merge_callback( $new_attribute, $extra_attribute ); } foreach ( $extra_attributes as $attribute_name => $value ) { if ( ! isset( $attribute_merge_callbacks[ $attribute_name ] ) ) { $attributes[ $attribute_name ] = $value; } } if ( empty( $attributes ) ) { return ''; } $normalized_attributes = array(); foreach ( $attributes as $key => $value ) { $normalized_attributes[] = $key . '="' . esc_attr( $value ) . '"'; } return implode( ' ', $normalized_attributes ); }