Updating bossbar

how do i update bossbars without spawning another one

 

If you update title:

PHP:

$title = "OK";
$health = 5;
$eid = 0;

$pk = new BossEventPacket();
$pk->bossEid = $eid;
$pk->eventType = BossEventPacket::TYPE_TITLE;
$pk->healthPercent = $health;
$pk->title = $title;
$player->dataPacket($pk);

 

is the title everything written in the bossbar?

 

No just title.

 

so i put that in my task so it updates everytime