Open only for certain users – like Google visitors

Hi Jan,

Something like this should work. 🙂

function my_prefix_show_box_in_ie($show, $box_id) {

 	// change 123 to the ID of the box you want to show for Google visitors only
	if( $box_id !== 123 || $show === false ) {
		return $show;
	}

	$referer = isset( $_SERVER['HTTP_REFERER'] ) ? $_SERVER['HTTP_REFERER'] : '';

	$show = ( stristr( $referer, 'google' ) !== false );

	return $show;
}

add_action('stb_show_box', 'my_prefix_show_box_in_ie', 10, 2);

Hope that helps!