Check all set of child page for given page

check_child.php

/* -----------------------------------------------------
* Page - Checks child subset to enable widget in sidebar
-------------------------------------------------- */

  function has_page_child_set( $page_check ) {
		
		global $post;

		//global $page_check;
		//$page_check = $name;

		//if( !empty( get_page($page_check)) ) return;

		$page_ID = get_ID_by_slug ($page_check);
		if ($page_ID ){
			$children = get_pages('child_of='.$page_ID);
			
			$page_list[] = $page_ID;
			
			foreach ($children as $child) {
				$page_list[] = $child->ID;	
			}
			
			return $page_list;
		
		} else {
			
			$page_list[]="";
			return $page_list;
		}
		
		

	} // page_child_set()