<?php
    class SQL {
        private $hostname;
        private $username;
        private $password;
        private $dbname;

        private $link;
        private $connected;

        public function __construct() {
            $this->hostname = "localhost";
            $this->username = "root";
            $this->password = "toor";
            $this->dbname = "pbnj";

            $this->connected = false;
        }

        public function set_connection_params($hosname, $username, $password, $db) {
            $this->hostname = $hostname;
            $this->username = $username;
            $this->password = $password;
            $this->dbname = $db;

            $this->connected = false;
        }

        public function query($query) {
            if ($this->connected == false)
                $this->_connect();

            return $this->link->query($query);
        }

        private function _connect() {
            $this->link = new mysqli($this->hostname, $this->username, $this->password, $this->dbname);
            $this->connected = true;
        }
    }
?>