สอบถามเรื่องการ redirect หลังจากจบฟังก์ชั่นใดๆ ลองทำแล้วแต่ไม่ทำงานครับ

	public static function logout(){
		DB::query("DELETE FROM webchat_users WHERE name = '".DB::esc($_SESSION['user']['name'])."'");
		$host="localhost";
		$username="";  
		$password=""; $db_name="test"; 
		mysql_connect("$host", "$username", "$password")or die("cannot connect"); 
		mysql_select_db("$db_name")or die("cannot select DB");
		$ss = $_SESSION["myusername"];
		//Update Member Status
		$sql_update_status = "Update members SET Status = 'Logout' where username = '$ss' ";
		$result2=mysql_query($sql_update_status);
		$_SESSION = array();
		unset($_SESSION);

		return array('status' => 1);
	}