<?php
// Define the WooCommerce product age threshold in months
$thresholdMonths = 3;

// Get current date and time
$currentDate = new DateTime();

// Setup WooCommerce query arguments
$args = array(
    'post_type' => 'product',
    'posts_per_page' => -1, // Retrieve all products
    'meta_query' => array(
        array(
            'key' => '_wc_last_active',
            'compare' => '<=',
            'value' => $currentDate->modify('-' . $thresholdMonths . ' months')->format('Y-m-d H:i:s'),
            'type' => 'DATETIME'
        )
    )
);

// Retrieve WooCommerce products matching the query
$products = new WP_Query($args);

// Loop through the products and delete them
if ($products->have_posts()) {
    while ($products->have_posts()) {
        $products->the_post();
        wp_delete_post(get_the_ID(), true);
    }
}

// Reset post data
wp_reset_postdata();