User Contributed Notes

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   Per Søderlind 5 years ago

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   The hook wpmu_new_blog gives you a deprecated notice and tells you to use wp_insert_site. Don’t do that, wp_insert_site fires too early. Instead, use wp_initialize_site with a priority higher than 100, as in:

   add_action( 'wp_initialize_site', 'wpdocs_action_wp_initialize_site', 900 );
   
   /**
    * Fires when a site's initialization routine should be executed.
    *
    * @param WP_Site $new_site New site object.
    */
   function wpdocs_action_wp_initialize_site( WP_Site $new_site ) : void {
   	switch_to_blog( $new_site->blog_id );
   
   	// do the job
   
   	restore_current_blog();
   }