Disabling Search on Wordpress

disable_search.php

// Disabling Search
function disable_search_query($query, $error = true) {

	if (is_search()) {
		$query -> is_search = false;
		$query -> query_vars[s] = false;
		$query -> query[s] = false;

		// to error
		if ($error == true)
			$query -> is_404 = true;
	}
}

add_action('parse_query', 'disable_search_query');
add_filter('get_search_form', create_function('$a', "return null;"));