can't find a work around for if a player misses a hit

[khortez]

PHP Code:

function Swing(){
  if(null in { player.x + 3, player.y + 1.5 } ){ 
    triggeraction(player.x + 3, player.y + 1.5, "Contact", player.account);
    player.chat = "Contact!";
  }else{
     player.chat = "No contact!";
   }
} 


I've been trying to check if the player hit's nothing. been kind of difficult to do and this is my latest attempt, any suggestions?