function __construct()
 {
     global $_zp_authority, $_userAddressFields;
     $firstTime = false;
     $tablecols = db_list_fields('administrators');
     foreach ($tablecols as $key => $datum) {
         if ($datum['Field'] == 'custom_data') {
             $firstTime = true;
             enableExtension('userAddressFields', true);
             break;
         }
     }
     parent::constructor('userAddressFields', self::fields());
     if ($firstTime) {
         //	migrate the custom data user data
         $result = query('SELECT * FROM ' . prefix('administrators') . ' WHERE `valid`!=0');
         if ($result) {
             while ($row = db_fetch_assoc($result)) {
                 $custom = getSerializedArray($row['custom_data']);
                 if (!empty($custom)) {
                     $sql = 'UPDATE ' . prefix('administrators') . ' SET ';
                     foreach ($custom as $field => $val) {
                         $sql .= '`' . $field . '`=' . db_quote($val) . ',';
                     }
                     setupQuery($sql);
                 }
             }
             db_free_result($result);
         }
         setupQuery('ALTER TABLE ' . prefix('administrators') . ' DROP `custom_data`');
     }
     $cloneid = bin2hex(FULLWEBPATH);
     if (OFFSET_PATH == 2 && isset($_SESSION['admin'][$cloneid])) {
         $user = unserialize($_SESSION['admin'][$cloneid]);
         $user2 = $_zp_authority->getAnAdmin(array('`user`=' => $user->getUser(), '`pass`=' => $user->getPass(), '`valid`=' => 1));
         if ($user2) {
             foreach (userAddressFields::fields() as $field) {
                 $user2->set($field['name'], $user->get($field['name']));
             }
             $user2->save();
         }
     }
 }