scope of a variable

I have a variable $poliza like this: $poliza = array( "tipo" => $tipo, "numero" => "", "cliente_id" => "", "poliza_id" => "" ); which I populate and use at a file called "polizanueva.php". Well, my problem is that from this file, users are redirected to another file with: //this is in polizanueva.php printf("<FORM action=caso.php method=post>"); printf("<INPUT type=submit value='Registrar caso'>"); printf("</FORM>"); How can I preserve the values of $poliza(defined in polizanueva.php) from the file caso.php? I tried declaring it global, but doesn't work. Is there a way to pass it like a parameter in the FORM declatarion? Thanks. -- Omar