Description #Description

A hash is generated using the array of query_vars. If doing custom queries via filters such as posts_where (where the SQL query is manipulated directly) you can still ensure there is a unique hash by injecting custom query vars via the parse_query filter. For example:

 add_filter( 'parse_query', function( $wp_query ) {
      $wp_query->query_vars['my_custom_query_var'] = true;
 } );

Doing so won’t have any negative effect on the query itself, and it will cause the hash to change.