Force posts to update (make no changes)

functions.php

<?php // Do not include this line

add_action( 'init', 'oc_force_post_update' );
function oc_force_post_update() {
  $my_posts = get_posts(
    array(
      'post_type' => 'post',
      'post_status' => 'publish',
      'posts_per_page' => 10,
      'offset' => 0,
    )
  );

  foreach ( $my_posts as $my_post ):
    wp_update_post( $my_post ); // comment this out to test your query
    // echo '<p>theoretically update ' . $my_post->ID . '</p>';
  endforeach;
}