How to add a specific block from a specific page?

Question

PHP

Good afternoon. There are 2 pages:

1. /user
   
2. /cart
   

But from these pages you can get to 1 page /order .
How to add a block to the /order page if the person came from the /user page .
Tried doing it like this:

if($_SERVER['HTTP_REFERER'] == "/user"){
             echo "Зашёл с аккаунта";
        } else if ($_SERVER['HTTP_REFERER'] == "/cart") {
            echo "С корзины зашёл";
        } else {
            echo "3 вариант";
        }

Gives always "3 option"

Answer 1

Because the full address is stored in - " https://domain.ltd/user "$_SERVER['HTTP_REFERER']

if (strpos($_SERVER['HTTP_REFERER'], '/user')) {
  echo 'Зашёл с аккаунта';
}