Remove items from WooCommerce shop if user does not have PMPro membership level.

pmpro_remove_cat_from_woo_shop.php

<?php

/**
 * Remove items from WooCommerce shop loop if user does not have an active PMPro Membership Level.
 * Tested on WooCommerce 3 and up.
 * Add this code to your PMPro Customizations Plugin - https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 * Please note that this won't restrict products if accessed directly and will require further custom code to achieve.
 * Visit https://paidmembershipspro.com for more info/assistance.
 */

add_action( 'pre_get_posts', 'pmpro_remove_cat_from_shop' );
  
function pmpro_remove_cat_from_shop( $q ) {

	// Bail if user is admin/member and do not affect any posts inside WP admin.
	if( ( pmpro_hasMembershipLevel() || current_user_can( 'manage_options' ) ) && ! is_admin() ){
		return;
	}
  
    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( 'member-only-slug', 'another-product-slug' ), // Change it to the slug you want to hide
            'operator' => 'NOT IN'
        )));
     
    }
  
    remove_action( 'pre_get_posts', 'pmpro_remove_cat_from_shop' );
  
}