RewriteEngine On
RewriteBase /AdminxX/view_user/

# Route "/users/{id}" to "users.php?id={id}"
RewriteRule ^users/([0-9]+)/?$ users.php?id=$1 [L,QSA]

# Fallback: If users.php is accessed directly
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule .* users.php [L]