Change number of products displayed per page (ok)

https://docs.woocommerce.com/document/change-number-of-products-displayed-per-page/

/**
 * Change number of products that are displayed per page (shop page)
 */
add_filter( 'loop_shop_per_page', 'new_loop_shop_per_page', 20 );

function new_loop_shop_per_page( $cols ) {
  // $cols contains the current number of products per page based on the value stored on Options -> Reading
  // Return the number of products you wanna show per page.
  $cols = 9;
  return $cols;
}

Khi thêm vào dòng code trên thì nó sẽ bị mất :)