php worked for 3.0 but not 3.6

[djjeffa]

I have a php file some one made for me a while ago who I cant currently contact and i havent use it in a while. Now that I am tring to use it I get

djjeffa, you do not have permission to access this page. This could be due to one of several reasons:

Your user account may not have sufficient privileges to access this page. Are you trying to edit someone else's post, access administrative features or some other privileged system?
If you are trying to post, the administrator may have disabled your account, or it may be awaiting activation.

this is a standolone php when i used it in the past i just uploaded it and pointed the browser to it to veiw it.

im not good with codding but im asumming the problem may be here?

if ($bbuserinfo['userid'] == 0)
{
  print_no_permission();

} else {