PL/php

creating composite type argument named table:

 CREATE TABLE employee (name text, basesalary integer, bonus integer); 

 CREATE TABLE employee_ext (name text, basesalary integer, bonus integer, other text); 

CREATE FUNCTION empcomp(table) RETURNS integer AS $$
  return $argsr0['basesalary'] + $argsr0['bonus'];
$$ LANGUAGE 'plphp';

SELECT name, empcomp(table) FROM employee;
SELECT name, empcomp(table) FROM employee_ext;

eg. type table is table taken from FROM (so once time will be employee, second time employee_ext)
now i must have x functions to do same thing with different argument