Array dimension as integer

Hello.

I'm using:

 PostgreSQL 7.3.2 on i686-pc-linux-gnu, compiled by GCC 2.95.3
 
and I'd like to have a function, which would receive array of varchars and then
create and EXECUTE insert statement for each of array elements (array has 1
dimension):

FOR i IN 1..array_length_function($1) LOOP
	EXECUTE ...;
END LOOP;

I've tried to use array_dims, but it gives data in string format:

select test_array('{\'a\'}');
WARNING:  Error occurred while executing PL/pgSQL function test_array
WARNING:  line 8 at select into variables
ERROR:  pg_atoi: error in "[1:1]": can't parse "[1:1]"

I've attached test_array source.

-- 

Victor Yegorov