FacetWP – override facet parameters

<?php

function fwp_override_facet_value( $params ) {
    foreach ( $params['facets'] as $key => $facet ) {
        if ( 'date' == $facet['facet_name'] ) {
            $params['facets'][ $key ]['selected_values'] = array( date( 'Y-m-d' ) );
            break;
        }
    }
    return $params;
}
add_filter( 'facetwp_render_params', 'fwp_override_facet_value' );