dbmvc-2

<?php

class Database {
   private $host = DB_HOST;
   private $user = DB_USER;
   private $pass = DB_PASS;
   private $db_name = DB_NAME;

   private $dbh;
   private $stmt;

    public function __construct()
    {
        // data source name
        $dsn = 'mysql:host='.$this->host.';dbname='.$this->db_name;
        $option = [
            PDO::ATTR_PERSISTENT => true,
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
        ];

        try{
            $this->dbh = new PDO($dsn, $this->user, $this->pass, $option);
        } catch(PDOException $e){
            die($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;
            }
        }
        $this->stmt->bindValue($param, $value, $type);
    }

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

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

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





}