Compares meta title and descriptions of active product pages using Yoast SEO

Sharing a short snippet I use that checks for meta title and description duplicates from Yoast SEO.

// Add submenu page under Tools
add_action('admin_menu', 'dpmc_add_submenu_page');
function dpmc_add_submenu_page() {
  add_submenu_page(
    'tools.php',
    'Duplicate Product Meta Checker',
    'Duplicate Product Meta Checker',
    'manage_options',
    'dpmc',
    'dpmc_submenu_page_callback'
  );
}

// Callback function for the submenu page
function dpmc_submenu_page_callback() {
  // Check if Yoast SEO is active
  if (!class_exists('WPSEO_Meta')) {
    echo '<p>Yoast SEO plugin is not active. Please install and activate it.</p>';
    return;
  }

  // Get all active products
  $args = array(
    'post_type' => 'product',
    'post_status' => 'publish',
    'posts_per_page' => -1,
  );
  $products = new WP_Query($args);

  // Initialize arrays to store product meta data
  $product_titles = array();
  $product_descriptions = array();

  // Loop through products and store meta data
  while ($products->have_posts()) {
    $products->the_post();
    $product_id = get_the_ID();
    $product_title = WPSEO_Meta::get_value('title', $product_id);
    $product_description = WPSEO_Meta::get_value('metadesc', $product_id);

    // Check if title or description is empty
    if (empty($product_title) || empty($product_description)) {
      continue;
    }

    // Check if title or description already exists in array
    if (in_array($product_title, $product_titles)) {
      echo '<p>Duplicate title found in product ID ' . $product_id . ' - ' . get_the_title() . '</p>';
    } else {
      $product_titles[] = $product_title;
    }

    if (in_array($product_description, $product_descriptions)) {
      echo '<p>Duplicate description found in product ID ' . $product_id . ' - ' . get_the_title() . '</p>';
    } else {
      $product_descriptions[] = $product_description;
    }
  }

  // Reset post data
  wp_reset_postdata();
}