Add event to modify search parameters before searching

An extension I'm creating needs to modify the ex_fid_ary variable before it is set in the SQL query. The core.search_get_posts_data and core.search_get_topic_data do not allow me to do this (see this topic -> https://www.phpbb.com/community/viewtopic.php?f=461&t=2279731). I'm proposing an event before pre-made searches are created (currently line 313 in search.php). I've included an event below - please add more parameters as see fit.

/**

* Event to modify the SQL parameters before being assigned to searches.

*

* @event core.search_modify_param_before

* @var	array	ex_fid_ary		Array of excluded forum ids

* @since 3.1.3

*/

$vars = array(

    'ex_fid_ary',

);

extract($phpbb_dispatcher->trigger_event('core.search_modify_param_before', compact($vars)));