I am not totaly sure of what you are trying to do.
If you include code it is like the page is actually coded with that code so nothing needs to be passed in on an include. i.e. The imported code has full access to the code that the page is imported to.
e.g.
<?php
// file name echo_hello.inc
echo $hello;
?>
<?php
// file named hello.php
$hello = "hello";
include( "echo_hello.inc" );
?>
When hello.php is exicuted $hello will echo.
I don't know why you would do it but you could also set a variable to global. $_GLOBAL['VARIABLE_NAME'] = VALUE;
If you need to pass the variables to another page, then in the url of the hyperlink to the page that needs the variables, you need to add ?VARIABLE_NAME=VALUE. Then you could access the information via the get super global ( $_GET['VARIABLE_NAME'] ).