CODE EXAMPLE FOR PHP

woo can not change products perpage in shop page

/**
* Change WooCommerce products per page
*/
 
add_filter( 'loop_shop_per_page', 'my_new_products_per_page', 9999 );
 
function my_new_products_per_page( $pr_per_page ) {
  $pr_per_page = 12;
  return $pr_per_page;
}