Sql Katman Mysqli Veritabanı Sınıfı

<?php
class SQLKatman {
	var $sunucu;
	var $kullaniciadi;
	var $sifre;
	var $veritabaniadi;
	var $link;
	function SQLKatman ($sunucu = "", $kullaniciadi = "", $pass = "", $veritabaniadi = "") {
		$this->sunucu = $sunucu;
		$this->kullaniciadi = $kullaniciadi;
		$this->sifre = $pass;
		$this->veritabaniadi = $veritabaniadi;
		$this->baglan();
	}
	function baglan(){
		$this->link=mysqli_connect($this->sunucu,$this->kullaniciadi,$this->sifre,$this->veritabaniadi);
		mysqli_set_charset($this->link, "utf8");
	}
	function close(){
		return mysqli_close($this->link);	
	}
	function sorgu($sorgu){
		$this->rs=mysqli_query($this->link,$sorgu);
		if (!$this->rs){
			echo("Hata: Hatalı sorgu \"".$sorgu."\"...<br>");
			echo("Hata: ".mysqli_errno($this->link)."<br>");
			die("Hata: ".mysqli_error($this->link)."<br>");
		}else{
			return $this->rs;
		}
	}
	function veri_ara ($row = 0) {
		return mysqli_data_seek($this->rs,$row);
	}
	function dizi_getir($rs=""){
		if($rs==""){$rs=$this->rs;}
		$this->row=mysqli_fetch_array($rs);
    return $this->row;
	}
	function birles_getir($rs=""){
		if($rs==""){$rs=$this->rs;}
		$this->row=mysqli_fetch_assoc($rs);
    return $this->row;
	}
	function nesne_getir($rs=""){
		if($rs==""){$rs=$this->rs;}
		$this->row=mysqli_fetch_object($rs);
    return $this->row;
	}
	function satir_say($rs=""){
		if($rs == ""){$rs=$this->rs;}
		$rs = $this->rs;
    return mysqli_num_rows($rs);
	}
	function etkilenen_satir() {
		return mysqli_affected_rows($this->link);
	}
	function serbest_sonuc($rs = "") {
		if($rs == ""){$rs=$this->rs;}
		$rs = $this->rs;
    return mysqli_free_result($rs);
	}
}
$s=new SQLKatman("localhost","root","","php");
$s->sorgu("select * from php where id=1");
print_r($s->dizi_getir());echo "<br>";
$s->sorgu("select * from php where id=1");
print_r($s->birles_getir());echo "<br>";
$s->sorgu("select * from php where id=1");
print_r($s->nesne_getir());echo "<br>";
$s->sorgu("select * from php where id=1");
print_r($s->satir_say());echo "<br>";
$s->sorgu("select * from php where id=1");
print_r($s->etkilenen_satir());echo "<br>";
$s->sorgu("select * from php where id=1");
print_r($s->serbest_sonuc());
$s->sorgu("select * from php where id=1");
var_dump($s->veri_ara(2));

?>

Çıktısı

Array ( [0] => 1 [id] => 1 ) 
Array ( [id] => 1 ) 
stdClass Object ( [id] => 1 ) 
1
1
bool(false)