Solved Error in PlaySoundPacket

Hello guys. What's wrong here?
P.s. made this in tutorial at forum, also used protocol\PlaySoundPacket

PHP:

    $pk=new PlaySoundPacket;
    $pk->soundName="challengesound";
    $pk->x=(int)$p->getX();
$pk->y=(int)$p->getY();
    $pk->z=(int)$p->getZ();
    $pk->volume=1;
    $pk->pitch=1;
    $p->dataPacket($pk);
    }


Console:
Error: Undefined constant AP\new PlaySoundPacket
2nd error after adding ::class:
Assign property "soundName" on string

 

Nvm, i fixed it