Possibility to see debug in server logs instead of the interface

When enabling logs, they are displayed in the interface, for all users.

I would like to see logs in servers logs on the server instead.

It can be done with error_log: https://www.php.net/manual/en/function.error-log

Simple patch:

diff --git a/include/functions.inc b/include/functions.inc
index f305e99e..d78c6543 100644
--- a/include/functions.inc
+++ b/include/functions.inc
@@ -193,6 +193,7 @@ function DEBUG ($level, $line, $function, $file, $data, $info = '')
     }
     echo '<div class="debug_div">';
     echo $output;
+    error_log($output);
     if (is_array($data)) {
       print_a($data);
     } else {

There should be a better patch, which can route the output depending on an option: interface (default) or server.