Remove custom post type slug from permalinks 2

remove-custom-post-type-slug-from-permalinks-2.php

<?php

/**
 * Have WordPress match postname to any of our public post types (post, page, race).
 * All of our public post types can have /post-name/ as the slug, so they need to be unique across all posts.
 * By default, WordPress only accounts for posts and pages where the slug is /post-name/.
 *
 * @param $query The current query.
 */
function gp_add_cpt_post_names_to_main_query( $query ) {

	// Bail if this is not the main query.
	if ( ! $query->is_main_query() ) {
		return;
	}

	// Bail if this query doesn't match our very specific rewrite rule.
	if ( ! isset( $query->query['page'] ) || 2 !== count( $query->query ) ) {
		return;
	}

	// Bail if we're not querying based on the post name.
	if ( empty( $query->query['name'] ) ) {
		return;
	}

	// Add CPT to the list of post types WP will include when it queries based on the post name.
	$query->set( 'post_type', array( 'post', 'page', 'race' ) );
}
add_action( 'pre_get_posts', 'gp_add_cpt_post_names_to_main_query' );

@kellenmace, Hi Kellen thx for your answer! Oops I lost that line somewhere.. Now the error is gone but the slugs (both) are not removed..
Permalinks saved a few times, caches cleared, clean install, latest WP, CPT's created with CPT UI.. For a single CPT your script still woks fine..
Any Ideas? Here is the code I have right now:

`/**

• Remove the slug from published post permalinks. Only affect our custom post type, though.
  */
  function gp_remove_cpt_slug( $post_link, $post ) {

  $custom_post_types=array ( 'example1', 'example2' );

  if ( ! in_array( $post->post_type, $custom_post_types ) ||'publish'!=$post->post_status ) {
  $post_link = str_replace( '/' . $post->post_type . '/', '/', $post_link );
  }

  return $post_link;
  }
  add_filter( 'post_type_link', 'gp_remove_cpt_slug', 10, 2 );

/**

• Have WordPress match postname to any of our public post types (post, page, race).

• All of our public post types can have /post-name/ as the slug, so they need to be unique across all posts.

• By default, WordPress only accounts for posts and pages where the slug is /post-name/.

• @param $query The current query.
  */
  function gp_add_cpt_post_names_to_main_query( $query ) {

  // Bail if this is not the main query.
  if ( ! $query->is_main_query() ) {
  return;
  }

  // Bail if this query doesn't match our very specific rewrite rule.
  if ( ! isset( $query->query['page'] ) || 2 !== count( $query->query ) ) {
  return;
  }

  // Bail if we're not querying based on the post name.
  if ( empty( $query->query['name'] ) ) {
  return;
  }

  // Add CPTs to the list of post types WP will include when it queries based on the post names.
  $query->set( 'post_type', array( 'post', 'page', 'example1', 'example2' ) );
  }
  add_action( 'pre_get_posts', 'gp_add_cpt_post_names_to_main_query' );`

Thank you so much for your help! Stefan

The code works for Parent Pages but for the child pages.
I am trying to remove the word 'slug' here

domain.com/slug/hosting (works)
domain.com/slug/hosting/wp-engine (getting 404 error)

My CPT is hierachical where the second links is the child of the first link. I am getting 404 error for the second.

code does not work.