How to pass and receive get value in modx revo?

Question

PHP

In a chunk I write the following link code:
<a href="">
I'm trying to get a value in another chunk using getPage, but I'm apparently doing something wrong, what exactly?

How to make it work and write this code correctly?

Answer 1

Instead of we write AND create a snippet called get :

<?php
return $_GET[$need];

Answer 2

If there is a getPage addition, then there is a simple construction
! - not to be cached
# - to be filtered from malware