I am trying to include analytic.php into head.tpl in WHMCS but it keep giving me a error.

Analytic.php location : root/analytic.php

Head.tpl location : root/whmcs/template/six/includes/head.tpl

I saw on google, WHMCS accept smarty PHP, so i am trying to include with Smarty PHP Code in head.tpl.

Code :

{include_php file="../../../../analytic.php"};

Also Tried :

{php}{include_php file="../../../../analytic.php"};{/php}

Note : I have already enabled Smarty PHP in WHMCS

But when i am entering the code, the WHMCS site get stop working :(. What the solution to include PHP file inside WHMCS or .tpl file?