Database.php

<?php
class Database{
    private $dbhost = DB_HOST;
    private $dbtype = DB_TYPE;
    private $dbname = DB_NAME;
    private $user = DB_USER;
    private $pass = DB_PASS;
    private $dbh, $stmt;

    public function __construct(){
        $dsn = "{$this->dbtype}:host={$this->dbhost};dbname={$this->dbname}";
        //koneksi ke database
        try{
            $this->dbh = new PDO($dsn, $this->user, $this->pass);
        }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);
    }
    public function rowCount(){
        return $this->stmt->rowCount();
    }
}