<?php
class Database {
    // PDO Connection Instance
    public $pdoCon;

    // MySQL database
    $serverHost;
    $databaseName;
    $databaseUsername;
    $databasePassword;

    public function __construct(){
        $this->$serverHost = "localhost";
        $this->$databaseName = "accounts";
        $this->$databaseUsername = "root";
        $this->$databasePassword = "";
    }

    // This opens the PDO connection
    function openConnection(){
        $this->$pdoCon = new PDO("mysql:host=". $this->$serverHost . "$serverHost;dbname=" . $this->$databaseName , $this->$databaseUsername, $this->$databasePassword);
        $this->$pdoCon->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
    }

    // This closes the PDO connection
    function closeConnection(){
        $this->$pdoCon = null;
    }

    // This returns a connection interface
    function getConnectionInstance(){
        return $this->$pdoCon;
    }
}
?>