Code-Snippets-Functions/Execute a function on a child site/WooCommerce/hide-product-from-specific-category-archive-after-a-time-period.txt

// Add a custom action to schedule a job when a product is published
add_action( 'woocommerce_admin_process_product_object', 'schedule_product_category_unassign', 10, 1 );
function schedule_product_category_unassign( $product ) {
    // Make sure that is a new product
    if ( $product->get_meta('_unassign_task') ) 
        return;

    $schedule_time = strtotime('+15 days'); // Schedule the job to run in 15 days
    $schedule_time = strtotime('+5 minutes'); // For testing on 5 minutes (to be removed or commented)
    $schedule_hook = 'unassign_new_arrival_product_category'; // Custom schedule hook

    if ( as_schedule_single_action( $schedule_time, $schedule_hook, array( $product->get_id() ) ) ) {
        $product->update_meta_data('unassign_cat', 'pending'); // Tag the product
    } else {
        $product->update_meta_data('unassign_cat', 'failed'); // Tag the product
    }
}

// Hook to run when the scheduled job is triggered
add_action( 'unassign_new_arrival_product_category', 'unassign_new_arrival_product_category_callback', 10, 1 );
function unassign_new_arrival_product_category_callback( $product_id )
{
    $product  = wc_get_product($product_id); // Get the product object
    $taxonomy = 'product_cat'; // Product category taxonomy
    $term_ids = $product->get_category_ids('edit'); // Get product categories

    if( empty($term_ids) ) return; // Be sure that there are product categories

    // Loop through assigned product categories
    foreach( $term_ids as $key => $term_id ) {
        // Check if the product is in the "New Arrival" category
        if ( term_exists('new-arrival', $taxonomy) && 'new-arrival' === get_term_by('term_id', $term_id, $taxonomy)->slug ) {
            unset($term_ids[$key]); // Remove 'new-arrival' category ID from the array

            $product->set_category_ids($term_ids); // Update product categories
            $product->update_meta_data('unassign_cat', 'complete'); // Update tagged product
            return $product->save(); // Save product changes
        }
    }
}