Php help, I have code, I need to modify it. Thanks for any help.

[4x4 Mecca]

The code was originally this

PHP Code:

    $vbulletin->input->clean_gpc("p","userbarid",TYPE_INT);
    $userbarresult=$db->query_read("SELECT userbarid FROM ".TABLE_PREFIX."userbar WHERE userbarid='".$vbulletin->GPC['userbarid']."'");
    if(!$db->num_rows($userbarresult)){
        eval(standard_error(fetch_error('unvalid_userbar')));
    }
    $db->query_write("UPDATE ".TABLE_PREFIX."user SET userbar='".$vbulletin->GPC['userbarid']."' WHERE userid='".$vbulletin->userinfo['userid']."'");
    $vbulletin->url = 'usercp.php' . $vbulletin->session->vars['sessionurl_q'];
    eval(print_standard_redirect('redirect_userbarselected')); 


I changed it to this

PHP Code:

    $vbulletin->input->clean_gpc("p","userbarid",TYPE_INT);
    $userbarresult=$db->query_read("SELECT userbarid FROM ".TABLE_PREFIX."userbar WHERE userbarid='".$vbulletin->GPC['userbarid']."'");
    $vbulletin->input->clean_gpc("p","userbarpath",TYPE_VARCHAR);
    $userbarresult=$db->query_read("SELECT userbarpath FROM ".TABLE_PREFIX."userbar WHERE userbarpath='".$vbulletin->GPC['userbarpath']."'");
    if(!$db->num_rows($userbarresult)){
        eval(standard_error(fetch_error('unvalid_userbar')));
    }
    $db->query_write("UPDATE ".TABLE_PREFIX."user SET userbar='".$vbulletin->GPC['userbarid']."' WHERE userid='".$vbulletin->userinfo['userid']."'");
    $vbulletin->url = 'usercp.php' . $vbulletin->session->vars['sessionurl_q'];
    eval(print_standard_redirect('redirect_userbarselected'));
    
    $db->query_write("UPDATE ".TABLE_PREFIX."user SET userbarpath='".$vbulletin->GPC['userbarpath']."' WHERE userbarpath='".$vbulletin->userinfo['userbarpath']."'");
    $vbulletin->url = 'usercp.php' . $vbulletin->session->vars['sessionurl_q'];
    eval(print_standard_redirect('redirect_userbarselected')); 


I don't know anything about coding, but I'm trying to grab another set of data called userbarpath and insert it into the user table. I get an error that says userbar does not exist when I try.. can someone please tell me why I'm doing wrong?