Woocommerce remove unused attributes on product variations

functions.php

<?php

add_action( 'init', function() {
  ini_set( 'memory_limit', '2048M' );
  set_time_limit( 0 );
  $posts = get_posts( [
    'post_type' => 'product',
    'posts_per_page' => -1
  ] );
  $count = 0;
  foreach ( $posts as $post ) {
    $product = get_product( $post );
    if ( $product->product_type !== 'variable' ) {
      continue;
    }
    $count ++;
    $va = $product->get_variation_attributes();
    $vas = [];
    foreach ( $product->get_attributes() as $attribute ) {
      if ( isset( $attribute['is_taxonomy'] ) && $attribute['is_taxonomy'] ) {
        $terms = wp_get_post_terms( $product->id, $attribute['name'] ) ;
        // var_dump( $terms );

        foreach ( $terms as $term ) {
          if ( in_array( $term->slug, $va[ $attribute['name'] ] ) ) {
            // var_dump( $term );
            if ( ! isset( $vas[$attribute['name']] ) ) {
              $vas[$attribute['name']] = [];
            }
            $vas[$attribute['name']][] = $term->term_id;
          }
        }
      }
    }
    foreach ($vas as $tax => $vals) {
      wp_set_post_terms(  $product->id, $vals, $tax  );
    }
  }

  wp_die( 'All attributes have been filtered: Total products changed: '. $count );

} );

It will be most likely your server running out, but you can stop this script after 10 products instead of -1

Thanks. I've managed to remove the redundant attributes via a Bulk Editor that does it in batches of 100. All done in around 15 minutes.

Yeah, if your server has a memory limit, trying to amend 20k products in one go might be a struggle haha

…

On 21 Aug 2021, at 16:05, moded-mike ***@***.***> wrote: ***@***.*** commented on this gist. Thanks. I've managed to remove the redundant attributes via a Bulk Editor that does it in batches of 100. All done in around 15 minutes. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe. Triage notifications on the go with GitHub Mobile for iOS or Android.