Description:
------------
the script below work as well only if the content of test.php is copied inside the "declare" in main.php instead using "include".
Then the Tick system conflicts with include()

Test script:
---------------
main.php
<?php
function track_variables ($key) {
   static $last = '';
   if ($last !== $GLOBALS[$key]) {
      echo "-variable $key changed to{".$GLOBALS[$key]."}-";
   }
   $last = $GLOBALS[$key];
}
register_tick_function ('track_variables', 'foo');
declare (ticks=1) {
    include("test.php");
}
?>
test.php
<?php
$foo = 10;
echo "<br>Hi!";
$foo *= $foo;
$foo = 'bar';
echo "<br>Gotta run";
echo "<br>Bye!";
?>

Expected result:
----------------
-variable foo changed to{10}-
Hi!-variable foo changed to{100}--variable foo changed to{bar}-
Gotta run
Bye!

Actual result:
--------------
Hi!
Gotta run
Bye!-variable foo changed to{bar}-