Description:
------------
When files are included from within classes, variables are not passed on to the included files.

Reproduce code:
---------------
a.php:
<?php

class Factory
{
    static function doinclude() {
        include_once('b.php');
    }
}

$var = "I've found a bug";
var_dump($var);

Factory::doinclude();

?>

b.php:
<?php

var_dump($var);

?>

Expected result:
----------------
string(16) "I've found a bug" string(16) "I've found a bug"

Actual result:
--------------
string(16) "I've found a bug" NULL