add_shortcode( 'product_description', 'display_product_description' );

function display_product_description( $atts ) {
$atts = shortcode_atts( array(
'id' => get_the_id(),
), $atts, 'product_description' );

global $product;

if ( ! is_a( $product, 'WC_Product' ) )
$product = wc_get_product( $atts['id'] );

$description = $product->get_description();

// İlk cümleyi almak için metni '.' karakterine göre ayır
$first_sentence = strtok( $description, '.' );

// İlk cümleyi döndür
return $first_sentence . '.';
}