Woocommerce Sub Category Sorting - Alphabetical

sub-category-sorting.php

<?php
/**

Works with Woocommerce 2.6.14

You will need to replace the function with: http://woocommerce.wp-a2z.org/oik_api/woocommerce_product_subcategories/
If the below does not work & then apply:

    usort($product_categories, function($a, $b)
    {
        return strcmp($a->name, $b->name);
    });

To the $product_categories variable on the latest function code.

This is a core override rather than applying a filter.

**/

function woocommerce_product_subcategories( $args = array() ) {
    global $wp_query;

    $defaults = array(
      'before'        => '',
      'after'         => '',
      'force_display' => false
    );

    $args = wp_parse_args( $args, $defaults );

    extract( $args );

    // Main query only
    if ( ! is_main_query() && ! $force_display ) {
      return;
    }

    // Don't show when filtering, searching or when on page > 1 and ensure we're on a product archive
    if ( is_search() || is_filtered() || is_paged() || ( ! is_product_category() && ! is_shop() ) ) {
      return;
    }

    // Check categories are enabled
    if ( is_shop() && '' === get_option( 'woocommerce_shop_page_display' ) ) {
      return;
    }

    // Find the category + category parent, if applicable
    $term       = get_queried_object();
    $parent_id     = empty( $term->term_id ) ? 0 : $term->term_id;

    if ( is_product_category() ) {
      $display_type = get_woocommerce_term_meta( $term->term_id, 'display_type', true );

      switch ( $display_type ) {
        case 'products' :
          return;
        break;
        case '' :
          if ( '' === get_option( 'woocommerce_category_archive_display' ) ) {
            return;
          }
        break;
      }
    }

    // NOTE: using child_of instead of parent - this is not ideal but due to a WP bug ( https://core.trac.wordpress.org/ticket/15626 ) pad_counts won't work
    $product_categories = get_categories( apply_filters( 'woocommerce_product_subcategories_args', array(
      'parent'       => $parent_id,
      'menu_order'   => 'ASC',
      'hide_empty'   => 0,
      'hierarchical' => 1,
      'taxonomy'     => 'product_cat',
      'pad_counts'   => 1
    ) ) );


    if ( ! apply_filters( 'woocommerce_product_subcategories_hide_empty', false ) ) {
      $product_categories = wp_list_filter( $product_categories, array( 'count' => 0 ), 'NOT' );
    }

    usort($product_categories, function($a, $b)
    {
        return strcmp($a->name, $b->name);
    });

    if ( $product_categories ) {
      echo $before;

      foreach ( $product_categories as $category ) {
        wc_get_template( 'content-product_cat.php', array(
          'category' => $category
        ) );
      }

      // If we are hiding products disable the loop and pagination
      if ( is_product_category() ) {
        $display_type = get_woocommerce_term_meta( $term->term_id, 'display_type', true );

        switch ( $display_type ) {
          case 'subcategories' :
            $wp_query->post_count    = 0;
            $wp_query->max_num_pages = 0;
          break;
          case '' :
            if ( 'subcategories' === get_option( 'woocommerce_category_archive_display' ) ) {
              $wp_query->post_count    = 0;
              $wp_query->max_num_pages = 0;
            }
          break;
        }
      }

      if ( is_shop() && 'subcategories' === get_option( 'woocommerce_shop_page_display' ) ) {
        $wp_query->post_count    = 0;
        $wp_query->max_num_pages = 0;
      }

      echo $after;

      return true;
    }

}