WooCommerce: Hide Category from Product Category Widget

Question

I’ve usually been able to solve each of my WP demands by myself but this one proved to be a bit tricky.

The thing is, I need to hide certain categories from the Product Category Widget based on the category I’m in.

Example: When I’m in category A, I want to show categories A, B, C, D but not E. However, when I’m in category B, I want to show categories A, B, C, D and E as well. Then, let’s say I’m in category C and I want to only show categories C and D.

I found the following code

add_filter( 'woocommerce_product_categories_widget_args', 'woo_product_cat_widget_args' );

function woo_product_cat_widget_args( $cat_args ) {

                $cat_args['exclude'] = array('15');

                return $cat_args;

}

What I want to do with this code is to add multiple lines where I would define that when, for example, I open category ID 1 don’t show IDs 2,3,4. Then the next line would define what IDs not to show for ID 2, next for let’s say ID 4, and so on.

/* EDIT An amazing stackoverflow user helped me by creating the code you can see in his post below. However, as we found out, the example I posted above only works for the built-in WP Product Categories Widget.

That led me to find out that the Product Categories Widget I use is custom-built with the theme I use and apparently, it uses this code to work:

if ( !function_exists( 'getbowtied_megamenu_output_shop_icons' )):
    /**
     * Build the layout for the "Shop Icons" type megamenu
     *
     * @param  int $theID  id of the menu item
     *
     * @return html
     */

    function getbowtied_megamenu_output_shop_icons( $theID, $cat= false) {
        if ( !GETBOWTIED_WOOCOMMERCE_IS_ACTIVE ) return;
            $cat_list = GBT_Opt::getOption('product_categories_icons_megamenu_' . $theID );
            ob_start();
            if ($cat !== true):
                $args= array( 'taxonomy' => 'product_cat','hide_empty' => 0, 'menu_order' => 'asc',  'parent' =>0, 'include' => $cat_list );
            else:
                $args= array( 'taxonomy' => 'product_cat','hide_empty' => 0, 'menu_order' => 'asc',  'parent' =>$theID, 'include' => $cat_list );
            endif;
            $cats = get_terms( $args );

            if ( is_array($cat_list)):
            $unsorted = array();
            $sorted   = array();

            foreach ($cats as $v) {
                $unsorted[$v->term_id] = $v;
            }

            foreach ($cat_list as $v) {
                if (isset($unsorted[apply_filters( 'wpml_object_id', $v, 'category', TRUE)]))
                $sorted[] = $unsorted[apply_filters( 'wpml_object_id', $v, 'category', TRUE)];
            }
            else:
                $sorted = $cats;
                $sorted = array_slice($cats, 0, 8);
            endif;

            echo '<div class="megamenu_icon_list">';
            foreach( $sorted as $cat ) {
                $icon_type = get_term_meta( $cat->term_id, 'getbowtied_icon_type', true );
                if ( $icon_type == 'custom_icon' ) {
                    $thumbnail_id   = get_term_meta( $cat->term_id, 'icon_img_id', true );
                    if ($thumbnail_id)
                        $icon = wp_get_attachment_thumb_url( $thumbnail_id );
                    else
                        $icon = wc_placeholder_img_src();
                    // Prevent esc_url from breaking spaces in urls for image embeds
                    // Ref: https://core.trac.wordpress.org/ticket/23605
                    $icon = str_replace( ' ', '%20', $icon );
                    echo '<a href="'.esc_url( get_term_link( $cat->term_id ) ).'"><img src="'. $icon .'" alt="'. $cat->name .'" /><span>'. $cat->name .'</span></a>';
                } else {
                    $icon = get_term_meta( $cat->term_id, 'icon_id', true );
                    if (!$icon) {
                        $icon = 'thehanger-icons-alignment_align-all-1';
                    }
                    echo '<a href="'.esc_url( get_term_link( $cat->term_id ) ).'"><i class="'. $icon .'"></i><span>'. $cat->name .'</span></a>';    
                } 
            }
            echo '</div>';
            $output = ob_get_contents();
            ob_end_clean();
            return $output;
    }
endif;

*/

Please, can anyone point me in the right direction as to how approach this task?

Thank you in advance.

Answer 1

There are several ways, for example in the following way

function woo_product_cat_widget_args( $cat_args ) { 
    if ( is_product_category() ) {
        // Get current category id
        $current_cat_id = get_queried_object_id();

        // Category id = ?, exclude ids ??
        $cat_id_1_exclude_ids = array( 1, 2, 3, 4 );
        $cat_id_2_exclude_ids = array( 1, 2, 3, 4, 5 );
        $cat_id_15_exclude_ids = array( 16, 18 );

        if ( !empty( $current_cat_id ) ) {
            // Excludes ID's based on current category id
            // Extra check that the variable name (array) exists
            $exclude_ids = isset( ${'cat_id_' . $current_cat_id . '_exclude_ids'} ) ? ${'cat_id_' . $current_cat_id . '_exclude_ids'} : '';

            if ( $exclude_ids ) {
                $cat_args['exclude'] = $exclude_ids;
            }
        }
    }

    return $cat_args;
}
add_filter( 'woocommerce_product_categories_widget_args', 'woo_product_cat_widget_args', 10, 1 );
add_filter( 'woocommerce_product_categories_widget_dropdown_args', 'woo_product_cat_widget_args', 10, 1 );