Wordpress widget logic contidional code to use in widgets

conditional.php

<?php
//Paste the code below into the widget logic field of you widget and edit the page IDs as needed

//The code below will display your widget on pages 8,9 and 10 and any page that is a child of page 8
global $post; return (is_page(array(8,9,10)) || in_array($post->post_parent, array(8)));

//The code below will display you widget on pages that us the faq-page.php template file
global $post; return (get_page_template_slug( $post->ID ) == 'page-templates/faq-page.php');