我使用的代码如下-

http://designloud.com/how-to-add-products-per-page-dropdown-to-woocommerce/?showmodaldialog=1#comment-1554

显示下拉选择器，以便用户可以选择每页要查看的产品数量。除了分页之外，其他都可以。选择下一页将返回“找不到页”404错误。我想这和饼干有关。有人能帮忙吗？谢谢

// Lets create the function to house our form
function woocommerce_catalog_page_ordering() {
?>


<form action="" method="POST" name="results">
<select name="woocommerce-sort-by-columns" id="woocommerce-sort-by-columns" class="sortby" onchange="this.form.submit()">
<?php

        //  This is where you can change the amounts per page that the user will use  feel free to change the numbers and text as you want, in my case we had 4 products per row so I chose to have multiples of four for the user to select.

$shopCatalog_orderby = apply_filters(\'woocommerce_sortby_page\', array(
                \'\'       => __(\'Results per page\', \'woocommerce\'),
                \'2\'    => __(\'2 per page\', \'woocommerce\'),
                \'36\'        => __(\'36 per page\', \'woocommerce\'),
                \'48\'        => __(\'48 per page\', \'woocommerce\'),
                \'64\'        => __(\'64 per page\', \'woocommerce\'),
            ));

            foreach ( $shopCatalog_orderby as $sort_id => $sort_name )
                echo \'<option value="\' . $sort_id . \'" \' . selected( $_SESSION[\'sortby\'], $sort_id, false ) . \' >\' . $sort_name . \'</option>\';
        ?>
</select>

</form>
<?php

} 

// now we set our cookie if we need to
function dl_sort_by_page($count) {
  if (isset($_COOKIE[\'shop_pageResults\'])) { // if normal page load with cookie
     $count = $_COOKIE[\'shop_pageResults\'];
  }
  if (isset($_POST[\'woocommerce-sort-by-columns\'])) { //if form submitted
    setcookie(\'shop_pageResults\', $_POST[\'woocommerce-sort-by-columns\'], time()+1209600, \'/\', \'beadsnwire.lukeseall.co.uk/\', false); //this will fail if any part of page has been output- hope this works!
    $count = $_POST[\'woocommerce-sort-by-columns\'];
  }
  // else normal page load and no cookie
  return $count;
}

add_filter(\'loop_shop_per_page\',\'dl_sort_by_page\');
add_action( \'woocommerce_before_shop_loop\', \'woocommerce_catalog_page_ordering\', 20 );

global $wp_query;
$cat = $wp_query->get_queried_object();
$action = ""; // default to current page
if( isset( $cat->term_id ) ) 
    $action = get_term_link( (int)$cat->term_id, "product_cat" );

<form action="<?php echo $action; ?>" method="POST" name="results">