Case insesnitive searches with postgres

I've tried for about a week to get the "~*" identifier to work with postgres to do a case insensitive search and haven't gotten it to work. Here's the query I'm trying to select: $result = pg_Exec( $conn, "SELECT DISTINCT author,title,price FROM books where author like '%".$Author."%' or title like '%".$Title."%' ") ; Now in this example, I don't have the "~*" included because it breaks the code. Can anyone help? Thanks