HELP WITH SOME PHP AND OOP

[jbwebdesign]

I am trying to edit a Script but i'm having problems with it because I keep getting this error

 

Fatal error: Call to a member function value() on a non-object

 

Can anyone tell me what this means?? and how can I fix it??

 

this is the line of code that gives me the error......

 

$row_user = $db->get_sql_row("SELECT user_id FROM probid_users WHERE user_id=" . $session->value('user_id'));

[jbwebdesign]

I fixed the problem!! never mind.....for anyone else that wants to know how, all i did was add the following to the top.....

 

global $db, $session;