Why is this variable used if it isn't declared?

[Davigetto]

Hello,

 

I'm developing modules for an IMS (Moodle) and, taking a look on the code, I've found something like this:

 

<?php //$Id: restore_check.html,v 1.48.2.6 2008/05/02 04:07:30 dongsheng Exp $
    //This page receive all the restore_form data. Then, if existing course
    //has been selected, shows a list of courses to select one.
    //It cheks that the parammeter from restore_form are coherent.
    //It puts all the restore info in the session.
    //Finally, it calls restore_execute to do the hard work
    //Get objects from session
    if ($SESSION) {
        $info = $SESSION->info;
        $course_header = $SESSION->course_header;
        if (isset($SESSION->restore)) {
            $restore = $SESSION->restore;
        }
    }

...

 

$SESSION variable is being read, however, in that file SESSION variable is not assigned at any place, and no declaration before. What is the reason for that?

 

Greetings

 

PD: Maybe I've done a bad explanation of my problem. If anyone needs more info, I shall give him it.

[stuffradio]

They could be using global variables?

[Mchl]

Maybe this file is included into some other script?

 

You're sure its $SESSION and not $_SESSION (which is default global variable)?

[Davigetto]

Maybe this file is included into some other script?

 

You're sure its $SESSION and not $_SESSION (which is default global variable)?

 

Do you refer this?

 

    //Call the form, depending the step we are

    if (!$launch) {
        include_once("restore_precheck.html");
    } else if ($launch == "form") {
        if (!empty($SESSION->restore->importing)) {
...

 

Over the include_once, $SESSION variable has a value, but is this value passed indirectly to restore_precheck.html? Does The code of restore_precheck.html represent that it is being located literally after "if (!$launch)" instruction?

 

PD: I'm a Java developer, not PHP, so seeing this kind of code makes me mad and strange...

[Mchl]

Yeah. It means that code from "restore_precheck.html" file is put in its entirety in this place.

 

See the manual for including