Using vb3's USEROPTIONS fields?

[memobug]

Can anyone explain how the USEROPTIONS array works? I would like to determine the COPPA status of the user. It used to be a field user.coppauser in vb2, but now I understand I need to extract it somehow of the useroptions in vb3

PHP Code:

// Defined constants used for user field.
$_USEROPTIONS = array(
        'showsignatures'    => 1,
        'showavatars'     => 2,
        'showimages'        => 4,
        'coppauser'         => 8,
        'adminemail'        => 16,
        'showvcard'         => 32,
        'dstauto'         => 64,
        'dstonoff'         => 128,
        'showemail'         => 256,
        'invisible'         => 512,
        'showreputation'    => 1024,
        'receivepm'         => 2048,
        'emailonpm'         => 4096,
        'hasaccessmask'     => 8192,
        //'emailnotification' => 16384, // this value is now handled by the user.autosubscribe field
        'postorder'         => 32768,
); 


How would I recover coppa status for a user? I am using this in PHP, not a template, if that matters.

Regards,

Matt