How do I use filter `testimonials_widget_defaults`

To create a global or central Testimonials Widget configuration, in your theme’sfunctions.php file, add similar code as follows.

function my_testimonials_widget_defaults( $array ) {
    $array['category']            = 'testimony';
    $array['char_limit']      = 250;
    $array['paging']          = 'true';
    $array['refresh_interval']    = 10;

    return $array;
}

add_filter( 'testimonials_widget_defaults', 'my_testimonials_widget_defaults' );