PDO Connextion

DataBase

<?php

class Database
{
    private $host = 'localhost';
    private $user = 'root';
    private $pass = '';
    private $dbname = 'myblog';

    private $dbh;
    private $error;
    private $stmt;

    public function __construct()
    {
        //Set DSN
        $dns = 'mysql:host=' . $this->host . ';dbname=' . $this->dbname;
        //Set Options
        $options = array(
            PDO::ATTR_PERSISTENT => true,
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
        );

        //Create new PDO
        try {
            $this->dbh = new PDO($dns, $this->user, $this->pass, $options);
        } catch (PDOException $e) {

            $this->error = $e->getMessage();
        }

    }

    public function query($query)
    {
        $this->stmt = $this->dbh->prepare($query);

    }

    public function bind($param, $value, $type = null)
    {
        if (is_null($type)) {
            switch (true) {
                case is_int($value):
                    $type = PDO::PARAM_INT;
                    break;
                case is_bool($value):
                    $type = PDO::PARAM_BOOL;
                    break;
                case is_null($value):
                    $type = PDO::PARAM_NULL;
                    break;
                default:
                    $type = PDO::PARAM_STR;
            }
        }
        $this->stmt->binValue($param, $value, $type);
    }

    public function execute()
    {
        $this->stmt->execute();
    }

    public function resultset()
    {
        $this->execute();
        return $this->stmt->fetchAll(PDO::FETCH_ASSOC);
    }
}

index

<?php
/**
 * Created by PhpStorm.
 * User: habib
 * Date: 9/19/2016
 * Time: 10:47 PM
 */

spl_autoload_register(function ($class_name){
include $class_name.".php";
});

$database= new Database();
$database->query('SELECT * FROM posts');
$rows=$database->resultset();
echo '<pre>';
print_r($rows);