我试过像$meta\\u rwp\\u user\\u score=（number\\u format\\u i18n（$meta\\u rwp\\u user\\u score，2）），但这是行不通的。我在哪里使用它？

<?php
$meta_rwp_user_score[\'meta_rwp_user_score\'] = get_post_meta(($anbieter_id),\'rwp_user_score\',true);

foreach ( $meta_rwp_user_score as $key => $value ) :
  if ( \'revision\' === $post->post_type ) {
    return;
  }

  if ( get_post_meta( $postid, $key, false ) ) {
    // If the custom field already has a value, update it.
    update_post_meta( $postid, $key, $value );
  } else {
    // If the custom field doesn\'t have a value, add it.
    add_post_meta( $postid, $key, $value);
  }

  if ( ! $value ) {
    // Delete the meta key if there\'s no value
    delete_post_meta( $postid, $key );
  }

endforeach;
?>