php classes & global variables

[smcleod]

Hi,

 

I have a php page that uses fpdf to produce some pdf stuff. At the start of the page I have the following

require ("inv_code39.php");

 

This include file extends the fpdf class to provide barcode functions.  I have also made the fpdf header & footer functions in this file (which are called when a new page is added using fpdf).

top of the inv_code39.php starts like this:

require ('fpdf.php');

 

class PDF_Code39 extends FPDF

{

function Footer()

{

 

 

My problem is the master page has variables that need to be used/displayed by the header and footer functions in inv_code39.php

 

Given the fpdf newpage function calls the header and footer functions automatically I can't pass variables to the functions by header($var, $var2) etc.

 

How do I define a global variable that I can use in both locations that stores the same value globally?