photonView.RPC("squareRef",PhotonTargets.All, hppp.curhp);

void OnTriggerEnter(Collider other) {
   if (other.tag == this.gameObject.tag){
    var hppp = other.GetComponent<hp>();

    squareRef(ref hppp.curhp);
    photonView.RPC("squareRef",PhotonTargets.All);
    
   PhotonNetwork.Instantiate("Flame1", gameObject.transform.position, gameObject.transform.rotation, 0);   
     PhotonNetwork.Destroy(gameObject);

  }

   }

[RPC]
  public void squareRef(ref float refParameter){
   refParameter -= 100;
   Debug.Log(refParameter);
  }