Variables really variable with shortcode?

Hi,

How can i pass a dynamic value to the statement if this dynamic value is not available before the user opens the page?(the serialized php way is to difficult for me)

I tryed to do something like this (in a Site):

[insert_php]

Some code to get the tribeid of the actual user...

echo "[wpdatatable id=1 var1=".$row['tribeid']."]";

[/insert_php]

Unfortunately this doesn’t work. The variable is not passed to the SQL statement.
If you give a static value to this variable, then it works.
I really do not understand why it works when i add a static variable, but it doesn’t work when im getting the variable with some php code?

Is there a way to do what i tryed with the above code? I need real dynamic tables with real variables which are changeable at runtime (changeable by php code in this site).

Thanks and best regards,
Toni