WooCommerce: “Load More Related Products” Ajax Button @ Single Product Page, PHP Snippet: “Load More” Ajax Button @ WooCommerce Single Product Page Related Products

 

PHP Snippet: “Load More” Ajax Button @ WooCommerce Single Product Page Related Products

I’ve tried to comment each part of the snippet, so that you can learn a thing or two about Ajax.

Note: you probably need to also use some code to always show the same set of Related Products on load, otherwise the “Load More” function may show totally wrong results upon click.

/**
 * @snippet       Related Products Load More Button
 * @how-to        Get CustomizeWoo.com FREE
 * @author        Rodolfo Melogli
 * @compatible    WooCommerce 7
 * @donate $9     https://businessbloomer.com/bloomer-armada/
 */
 
add_filter( 'woocommerce_product_loop_end', 'bbloomer_related_products_load_more_button' );
  
function bbloomer_related_products_load_more_button( $html ) {
 
   // ONLY TARGET THE RELATED PRODUCTS LOOP
   if ( wc_get_loop_prop( 'name' ) === 'related' ) {
    
      // SHOW BUTTON
      $html .= 'Load More Related Products';
 
      // TRIGGER AJAX 'loadmore' ACTION ON CLICK
      // AND APPEND MORE RELATED PRODUCTS 
      wc_enqueue_js( "
         var page = 2;
         var ajaxurl = '" . admin_url( 'admin-ajax.php' ) . "';
         $('body').on('click', '.loadmore', function(evt) {
            var data = {
               'action': 'loadmore',
               'page': page,
               'product_id': " . get_queried_object_id() . ",
            };
            $.post(ajaxurl, data, function(response) {
               if(response != '') {
                  $('.related .products ').append(response);
                  page++;
               }
            });
         });
      " );
   }
   return $html;
}
 
// DEFINE WHAT HAPPENS WHEN 'loadmore' ACTION TRIGGERS
add_action( 'wp_ajax_nopriv_loadmore', 'bbloomer_related_products_load_more_event' );
add_action( 'wp_ajax_loadmore', 'bbloomer_related_products_load_more_event' );
 
function bbloomer_related_products_load_more_event() {
 
   // GET PARAMETERS FROM POSTED DATA
   $paged = $_POST['page'];
   $product_id = $_POST['product_id'];
 
   // DEFINE USEFUL QUERY ARGS:
   // 1. CURRENT PRODUCT
   $product = wc_get_product( $product_id );
 
   // 2. PAGINATION AND SORTING
   $args = array(
      'posts_per_page' => 3,
      'paged' => $paged,
      'orderby' => 'id',
      'order' => 'desc',
   );
 
   // 3. IDS TO EXCLUDE: ON LOAD MORE, WE DONT WANT THE FIRST 3 RELATED PRODUCTS AGAIN
   // SO WE APPLY AN OFFSET TO GET THE "NEXT 3" PRODUCTS
   $exclude = array_slice( array_map( 'absint', array_values( wc_get_related_products( $product->get_id(), -1 ) ) ), 0 , $args['posts_per_page'] * ( $paged - 1 ) );
 
   // LETS CALCULATE AND SORT RELATED PRODUCTS
   $related_products = array_filter( array_map( 'wc_get_product', wc_get_related_products( $product->get_id(), $args['posts_per_page'], $exclude + $product->get_upsell_ids() ) ), 'wc_products_array_filter_visible' );
   $related_products = wc_products_array_orderby( $related_products, $args['orderby'], $args['order'] );
 
   // LETS DISPLAY THEM
   foreach ( $related_products as $related_product ) {
      $post_object = get_post( $related_product->get_id() );
      setup_postdata( $GLOBALS['post'] =& $post_object );
      wc_get_template_part( 'content', 'product' );
   }   
   wp_die();
 
}