Help: v('p1_test'):=1; doesn't work why?

Question

I want to update states on p34_level_1, 2, 3, 4 etc..
But it seems I can use v('p34_level_1') one way?
for example:
Variable_Value:= v('p34_level_1'); -- <----works correctly
but I cant go:
v('p34_level_1'):= Variable_Value; -- <----DOESN'T work
Below show my code basically i want to loop through some fields and update the contents with values,
any ideas? or suggestions?
I get this error:
ORA-06550: line 17, column 28: PLS-00103: Encountered the symbol ":" when expecting one of the following: := . ( % ;
declare
count_levels number(12,0);
begin
-- Count levels
select count(level_id)
into count_levels
from wi_ccqual_level
where bu = :p1_buid;
-- update page
FOR i IN 1 .. count_levels
LOOP
v('P34_LEVEL_' || i): = i;
--i = i;
END LOOP;
END;

Answer 1

Hi Vanadium
Function v('ITEM') just reads item values from APEX environment.
If you want to update item values from PL/SQL you should use apex_util.set_session_state API
Syntax: apex_util.set_session_state(item,value)
So you should write: apex_util.set_session_state('P34_LEVEL_'||i , i );
I hope this helps you
Oscar