page_rating
$meta_query = array( array( 'key' => 'page_rating', 'value' => '$minimal_rating, $maximal_rating', 'compare' => 'BETWEEN', 'type' => 'NUMERIC', ), );
$meta_query = array( array( 'key' => 'page_rating', 'value' => '$minimal_rating, $maximal_rating', 'compare' => 'BETWEEN', 'type' => 'NUMERIC', ), );