Horde_Date_Recurrence::setRecurInterval PHP Method

    public function setRecurInterval($interval)
    {
        if ($interval > 0) {
            $this->recurInterval = $interval;
        }
    }

 /**
  * Obtain a recurrence object. Note this returns a Horde_Date_Recurrence
  * object, not Horde_ActiveSync_Message_Recurrence.
  *
  * @return Horde_Date_Recurrence
  */
 public function getRecurrence()
 {
     if (!($recurrence = $this->_getAttribute('recurrence'))) {
         return false;
     }
     $d = clone $this->_getAttribute('starttime');
     $d->setTimezone($this->getTimezone());
     $rrule = new Horde_Date_Recurrence($d);
     /* Map MS AS type field to Horde_Date_Recurrence types */
     switch ($recurrence->type) {
         case Horde_ActiveSync_Message_Recurrence::TYPE_DAILY:
             $rrule->setRecurType(Horde_Date_Recurrence::RECUR_DAILY);
             break;
         case Horde_ActiveSync_Message_Recurrence::TYPE_WEEKLY:
             $rrule->setRecurType(Horde_Date_Recurrence::RECUR_WEEKLY);
             $rrule->setRecurOnDay($recurrence->dayofweek);
             break;
         case Horde_ActiveSync_Message_Recurrence::TYPE_MONTHLY:
             $rrule->setRecurType(Horde_Date_Recurrence::RECUR_MONTHLY_DATE);
             break;
         case Horde_ActiveSync_Message_Recurrence::TYPE_MONTHLY_NTH:
             $rrule->setRecurType(Horde_Date_Recurrence::RECUR_MONTHLY_WEEKDAY);
             $rrule->setRecurOnDay($recurrence->dayofweek);
             break;
         case Horde_ActiveSync_Message_Recurrence::TYPE_YEARLY:
             $rrule->setRecurType(Horde_Date_Recurrence::RECUR_YEARLY_DATE);
             break;
         case Horde_ActiveSync_Message_Recurrence::TYPE_YEARLYNTH:
             $rrule->setRecurType(Horde_Date_Recurrence::RECUR_YEARLY_WEEKDAY);
             $rrule->setRecurOnDay($recurrence->dayofweek);
             break;
     }
     if ($rcnt = $recurrence->occurrences) {
         $rrule->setRecurCount($rcnt);
     }
     if ($runtil = $recurrence->until) {
         $rrule->setRecurEnd(new Horde_Date($runtil));
     }
     if ($interval = $recurrence->interval) {
         $rrule->setRecurInterval($interval);
     }
     return $rrule;
 }