/**
  * Returns the title for a given user.
  *
  * @param array $ldap_user
  * @param array $mapping
  * @return null|string
  * @deprecated since 3.0, will be removed in 3.2
  */
 public static function get_title($ldap_user = array(), $mapping = array())
 {
     if (!$mapping) {
         return NULL;
     }
     if (isset($mapping['title']) && preg_match('`<([^$]*)>`', $mapping['title'], $attribute)) {
         if ($attribute[1] === 'dn') {
             return $ldap_user[$attribute[1]];
         }
         return Authentication::replaceLdapMarkers($mapping['title'], $ldap_user);
     }
     return NULL;
 }