wp-no-cpt-single-views.php

/*
 * Keep WordPress native custom-post-type archive view, while redirecting any single views back to the archive.
 * To use when single views are not wanted or needed.
 * Takes no parameters.
*/


add_action( 'template_redirect', 'fq_disable_single_cpt_views' );

function fq_disable_single_cpt_views() {

  $cpts_without_single_views = array( 'xxxx_my-cpt_xxx', 'xxxx_another-cpt_xxx' );
  $queried_post_type = get_query_var('post_type');
  
  if ( is_single() && in_array( $queried_post_type, $cpts_without_single_views )  ) {
    wp_redirect( home_url( '/' . $queried_post_type . '/' ), 301 );
    exit;
  }
}