$id= $_GET['id'];
$post_id= $_POST['post_id'];

$search = filter_input(INPUT_GET, 'search', FILTER_SANITIZE_SPECIAL_CHARS);

$range = array('options'=>array('default'=>1, 'min_range'=>0, 'max_range'=>10));
$id = filter_input(INPUT_GET, 'id', FILTER_VALIDATE_INT, $range);