Description:
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*** I'm resubmitting this bug because my original bugid got lost somehow in the database. My original bug ID is showing as some old bug from two years ago ***
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I was testing some session-setting code that uses PATH_INFO to set session
variables from PATH_INFO. After exploding PATH_INFO and using the
information, I wanted to redirect back to the page.

This didn't work as expected. The page I was attempting to redirect to was
treated as a PATH_INFO value.

The only way to resolve this was to use an absolute URL as the Location.

The whole purpose is to have a single page as the URL.

An example URL is:

http://hostname/~username/directory/main.php/1/2

This would set the current menu to 1 and the current task as 2. These
values are for a sort of breadcrumb system. The tasks are specific to a
menu and are pulled from a database to build the tasklist.

What ends up happening is $menu gets overwritten with main.php instead of
1.

When this is moved to production, the desired URL will actually be:

http://hostname/main.php/1/2

which should redirect to:

http://hostname/main.php after parsing the PATH_INFO.

Reproduce code:
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$MYURL="http://hostname/~username/directory/"
list($dummy,$menu,$task)=explode('/',$_SERVER['PATH_INFO']);
if($task)
{
        $_SESSION['CurrentMenu'] = $menu;
        $_SESSION['CurrentTask'] = $task;
        // This works
        header("Location: ".$MYURL."main.php");
        // This does not:
        // header("Location: main.php");
        exit;
}else($menu){
        $_SESSION['CurrentMenu'] = $menu;
        header("Location: ".$MYURL."main.php");
        exit;
}


Expected result:
----------------
PATH_INFO should be parsed properly.

PAge should be refreshed as main.php with the session variables set as
shown.

Actual result:
--------------
$menu gets overwritten with main.php instead of 1 after first redirect.