ช่วยหน่อยครับต้องการใช้ sqlsrv แทน mysqli เพื่อทำงานร่วมกับ MS sqlserver 2014

<?php
class DBController {
  private $host = "localhost";
  private $user = "root";
  private $password = "";
  private $database = "chilepu";
  private $conn;


  function __construct() {
    $this->conn = $this->connectDB();
  }

  function connectDB() {
    $conn = sqlsrv_connect($this->host,$this->user,$this->password,$this->database);
    return $conn;
  }

  function runQuery($query) {
    $result = sqlsrv_query($this->conn,$query);
    while($row=sqlsrv_fetch_assoc($result)) {
      $resultset[] = $row;
    }
    if(!empty($resultset))
      return $resultset;
  }

  function numRows($query) {
    $result  = sqlsrv_query($this->conn,$query);
    $rowcount = sqlsrv_num_rows($result);
    return $rowcount;
  }
}
?>

<?php
class ms_sql{
	private $conn;
	private $stmt;
	public function __construct($ip, $db, $user, $psw){
		$conInfo = array(
			"Database"=>$db, "UID"=>$user, "PWD"=>$psw, "MultipleActiveResultSets"=>true, "CharacterSet" => "UTF-8"
		);
		$this->conn = sqlsrv_connect( $ip, $connectionInfo);
		if( !$this>conn ) die( print_r( sqlsrv_errors(), true));
	}
	//////////////////////////////////////////////////////////
	public function lastInsertId(){
		if(isset($queryID)){
			sqlsrv_next_result($this->stmt); 
			sqlsrv_fetch($this->stmt);
			return sqlsrv_get_field($this->stmt, 0); 
		}else{
			return false;
		}
	}		
	///////////////////////////////////////////////////////////
	public function query($sql, $param){
		$this->stmt = sqlsrv_query( $this->conn, $sql, $param, array( "Scrollable" => SQLSRV_CURSOR_KEYSET));
	}
	public function fetch_row(){
		return sqlsrv_fetch_array($this->stmt,SQLSRV_FETCH_NUMERIC); 
	}
	public function fetch_assoc(){
		return sqlsrv_fetch_array($this->stmt,SQLSRV_FETCH_ASSOC); 
	}
	public function num_rows(){
		return sqlsrv_num_rows( $this->stmt );
	}
}
$db=new ms_sql('ip','user','psw','dbname');
$db->query('select * from tablename where id = ?', array(1));
while($ro = $db->fetch_assoc()){
	var_dump($ro);
}

public function query($sql, $param){
// เป็น
public function query($sql, $param=[]){