Hide category in the WooCommerce shop page - php

Question

I've been trying to hide a specific category from SHOP page. I found this code:
add_filter( 'pre_get_posts', 'custom_pre_get_posts_query' );
function custom_pre_get_posts_query( $q ) {
if ( ! $q->is_main_query() ) return;
if ( ! $q->is_post_type_archive() ) return;
$q->set( 'tax_query', array(array(
'taxonomy' => 'product_cat',
'field' => 'slug',
'terms' => array( 'CATEGORY TO HIDE' ),
'operator' => 'NOT IN'
)));
remove_filter( 'pre_get_posts', 'custom_pre_get_posts_query' );
}
I've pasted this code in my theme function.php file but I'm not achieving the result...
Can anybody help me please?

Answer 1

I know this is a bit late, but had this problem myself and solved it with the following function:
add_filter( 'get_terms', 'get_subcategory_terms', 10, 3 );
function get_subcategory_terms( $terms, $taxonomies, $args ) {
$new_terms = array();
// if a product category and on the shop page
if ( in_array( 'product_cat', $taxonomies ) && ! is_admin() && is_shop() ) {
foreach ( $terms as $key => $term ) {
if ( ! in_array( $term->slug, array( '**CATEGORY-HERE**' ) ) ) {
$new_terms[] = $term;
}
}
$terms = $new_terms;
}
return $terms;
}

Answer 2

The following snippet it works fine for me:
add_action( 'pre_get_posts', 'custom_pre_get_posts_query' );
function custom_pre_get_posts_query( $q ) {
if ( ! $q->is_main_query() ) return;
if ( ! $q->is_post_type_archive() ) return;
if ( ! is_admin() && is_shop() ) {
$q->set( 'tax_query', array(array(
'taxonomy' => 'product_cat',
'field' => 'slug',
'terms' => array( 'your category slug' ), // Don't display products in the knives category on the shop page
'operator' => 'NOT IN'
)));
}
remove_action( 'pre_get_posts', 'custom_pre_get_posts_query' );
}
I'm wondering how can I achieve the same for the products excluded within the category to be searchable via product search, while using the snippet those products gets totally hidden.

Answer 3

Simple way to hide a category from everything except the admin backend:
In functions.php:
add_filter( 'get_terms', 'hide_category', 10, 1 );
function hide_category( $terms ) {
$new_terms = array();
foreach ( $terms as $term ) {
if ( $term->slug !== 'secret_category' ) {
$new_terms[] = $term;
} else if ( $term->taxonomy !== 'product_cat' || is_admin() ) {
$new_terms[] = $term;
}
}
return $new_terms;
}
If you want to only hide it from the shop, add || !is_shop() to the else if condition.

Answer 4

If you want to hide some categories in your theme you can just pass exclude argument in the wp_list_categories function:
wp_list_categories( array(
'taxonomy' => 'product_cat',
'hide_empty' => 1,
'use_desc_for_title' => 0,
'title_li' => ' ',
'show_count' => 0,
'exclude' => '63' // <-- Hidden) );