using postgresql functions from php

I have created a function in postgresql

CREATE OR REPLACE FUNCTION public.insert_vpn_masteraccount(varchar, varchar,
varchar, varchar, varchar, varchar, varchar, varchar, varchar)

RETURNS varchar AS

'

DECLARE

BEGIN

insert into masteraccount(fname,midint,lname,username,atype)
values($1,$2,$3,$4,$5);

insert into passwd(u_id,currentpwd) values((select max(u_id) from
masteraccount where username=$4),$6);

insert into ipinfo(u_id,ipaddress,atype) values((select max(u_id) from
masteraccount where username=$4),$7,$5);

insert into userinfo(u_id,agency,user_email) values((select max(u_id) from
masteraccount where username=$4),$8,$9);

return masteraccount.u_id where masteraccount.username=$4;

END;

'

LANGUAGE 'plpgsql' VOLATILE;

I can insert data using this function with a sql statement by typing

select
insert_vpn_masteraccount('tom','d','johnson','tomd.johnson','V','1234','DHCP
','AGR','idontcare(at)care(dot)com'

this works fine

but when I try to do it from a php web page using

$enter = $db_object->query("SELECT
insert_vpn_masteraccount('$fname','$mi','$lname','$acc_type','$passwd','$ip'
,'$agency','$contact')");

This does not work

Can anyone help me?

Thanks

Robert Stewart

Network Eng

Commonwealth Office of Technology

Finance and Administration Cabinet

101 Cold Harbor

Work # 502 564 9696

Cell # 502 330 5991

Email RobertD(dot)Stewart(at)ky(dot)gov <mailto:RobertD(dot)Stewart(at)ky(dot)gov>