I have a small script that if you run it locally (windows) or on the server where I have deployed the code, it works fine.

It does 2 things, on the one hand I include some of its own classes and on the other hand I make a "fopen" of an html file in this way.

Include

include('Class/MysqlClass.php');
include('Class/UtilsClass.php');

Fopen

$handle=fopen("../Templates/email_esp.html","rb");

As I comment in local as in remote if I execute this script from the script directory it does not give problems of ROUTES

The problem is if I run it from cron with this statement

*/30 16-17 * * 1-6       su -c 'php /var/www/html/test_project/index.php' -s /bin/sh www-data 

Then it tells me that it does not find the classes. Instead if I put the relative path of the server type this if it works

include('/var/www/html/test_project/Class/MysqlClass.php');

And the same for fopen

$handle=fopen("/var/www/html/test_project/Templates/email_esp.html","rb");