/**
  * Fills out {@link userprefs_keys} and {@link userprefs_disallow}
  *
  * @uses PMA_read_userprefs_fieldnames()
  */
 private function _loadUserprefsInfo()
 {
     if ($this->userprefs_keys === null) {
         $this->userprefs_keys = array_flip(PMA_read_userprefs_fieldnames());
         // read real config for user preferences display
         $userprefs_disallow = defined('PMA_SETUP') ? ConfigFile::getInstance()->get('UserprefsDisallow', array()) : $GLOBALS['cfg']['UserprefsDisallow'];
         $this->userprefs_disallow = array_flip($userprefs_disallow);
     }
 }
/**
 * Returns a user preferences array filtered by $cfg['UserprefsDisallow']
 * (blacklist) and keys from user preferences form (whitelist)
 *
 * @uses PMA_array_write()
 * @uses PMA_read_userprefs_fieldnames()
 * @param array $config_data path => value pairs
 * @return array
 */
function PMA_apply_userprefs(array $config_data)
{
    $cfg = array();
    $blacklist = array_flip($GLOBALS['cfg']['UserprefsDisallow']);
    if (!$GLOBALS['cfg']['UserprefsDeveloperTab']) {
        // disallow everything in the Developers tab
        $blacklist['Error_Handler/display'] = true;
        $blacklist['Error_Handler/gather'] = true;
        $blacklist['DBG/sql'] = true;
    }
    $whitelist = array_flip(PMA_read_userprefs_fieldnames());
    // whitelist some additional fields which are custom handled
    $whitelist['ThemeDefault'] = true;
    $whitelist['fontsize'] = true;
    $whitelist['lang'] = true;
    $whitelist['collation_connection'] = true;
    $whitelist['Server/hide_db'] = true;
    $whitelist['Server/only_db'] = true;
    foreach ($config_data as $path => $value) {
        if (!isset($whitelist[$path]) || isset($blacklist[$path])) {
            continue;
        }
        PMA_array_write($path, $cfg, $value);
    }
    return $cfg;
}