User.php

include("DB.php");
class User extends DB
{
	private $user_id;
	private $first_name;
	
	function __construct(){
		
	}
	
	public function __seter($name, $value) {

		$restricted = array("login");
		if(in_array($name, $restricted))
		{
			throw new Exception("Un-Authorized Access of Property $name");	
		}
        $method = "set_$name";

        if (!method_exists($this, $method)) {
            throw new Exception("SET:Property $name does not exist");
        }
        $this->$method($value);
    }

    public function __geter($name) {

        $method = "get_$name";
        if (!method_exists($this, $method)) {
            throw new Exception("GET:Property $name does not exist");
        }

        return $this->$method();
    }
	
	private function set_first_name($name)
	{
		if(empty($name))
			throw new Exception("Empty first_name");
		else
			$this->first_name = $name;
	}
	private function get_first_name()
	{
		return $this->first_name;
	}
	
	public function login_user()
	{
		$sql = "
			SELECT *
			FROM test_table
			where email = $email
			and password = $password
			";
		try
		{
			$response = DB::run($sql);
			$row = $response->fetch(PDO::FETCH_OBJ);			
			$_SESSION['user_obj'] = serialize($row);
		}
		catch(Exception $px)
		{
			echo($px->getMessage());
		}
	}
}