// Register Default Headers function custom_default_headers() { $headers = array( 'eiffel_tower' => array( 'description' => __( 'Eiffel Tower', 'text_domain' ), 'url' => '%s/images/eiffel_tower.jpg', 'thumbnail_url' => '%s/images/eiffel_tower_small.jpg', ), 'egyptian_pyramids' => array( 'description' => __( 'Egyptian Pyramids', 'text_domain' ), 'url' => '%s/images/egyptian_pyramids.jpg', 'thumbnail_url' => '%s/images/egyptian_pyramids_small.jpg', ), 'taj_mahal' => array( 'description' => __( 'Taj Mahal', 'text_domain' ), 'url' => '%s/images/taj_mahal.jpg', 'thumbnail_url' => '%s/images/taj_mahal_small.jpg', ), 'colosseum' => array( 'description' => __( 'Colosseum', 'text_domain' ), 'url' => '%s/images/colosseum.jpg', 'thumbnail_url' => '%s/images/colosseum_small.jpg', ), 'machu_picchu' => array( 'description' => __( 'Machu Picchu', 'text_domain' ), 'url' => '%s/images/machu_picchu.jpg', 'thumbnail_url' => '%s/images/machu_picchu_small.jpg', ), ); register_default_headers( $headers ); } add_action( 'after_setup_theme', 'custom_default_headers' );