How to show or hide widgets on specfic pages?

The current sample is setup to only display the core ‘pages’ widget on the contact page only. Don’t forget that is_page also accepts an array of page names and id’s.

add_filter( 'widget_display_callback', 'hide_widget_pages', 10, 3 );

function hide_widget_pages( $instance, $widget, $args ) {
  if ( $widget->id_base == 'pages' ) { // change 'pages' to widget name
     if ( !is_page( 'contact' ) ) {    // change page name
         return false;
     }
  }
}