class whatever {

  private $db;
  var $type;

function whatever($type) {
                $this->type = $type;
		$this->db = new mysqli($host, $user, $pass, $dbName);
		if(mysqli_connect_error()) die("ERROR: " . mysqli_connect_errno());
	}

}

public function doQuery($someshit) {
var_dump($this->db);
if($this->db->query($someshit)) {
 echo "bologna";
 return true;
  }
}

public function someShit($shit) {
 if($this->doQuery($shit)) echo "ok";
}

----------------------------------

class somethingelse extends whatever {

 function somethingelse() {
  $this->whatever(1);
}

 function doShit($something) {
  if($this->doQuery($something)) echo "hello";
  }


}

------------------------------------

$whatever = new somethingelse();
$whatever->doShit("select * from something"); // returns mysqli error "cannot fetch mysqli result"

$whatever->someShit("select * from whatever"); // works fine

why?