/**
* Call another IVR, current one is placed on the stack
* @param $ivrname Name of the IVR to call to
* @param $state Desired initial state of the new IVR
* @return True if called to a new IVR, false if it doesn't exist
*/
static function Call($ivrname, $state = null)
{
global $yate_ivr_current;
global $yate_ivr_stack;
$obj = IVR::CreateIVR($ivrname);
if ($obj === null) {
return false;
}
if ($yate_ivr_current !== null) {
array_unshift($yate_ivr_stack, $yate_ivr_current);
}
$yate_ivr_current = $obj;
$yate_ivr_current->OnEnter($state);
return true;
}
