TrinityCore Database Class

<?php
// This is here to prevent remote access to this file
if(!defined('LOCK')) {
    die("Access Denied!");
}

// This is here to gather database connection information
require('config.php');

// This is where the magic happens
class Database {
    // Connect to the database using PDO which is more secure than MySQL and MySQLi
    function connect($host,$dbname,$port,$charset,$username,$password) {
        $dsn = "mysql:host=$host;dbname=$dbname;port=$port;charset=$charset";
        $opt = [
            PDO::ATTR_ERRMODE               => PDO::ERRMODE_EXCEPTION,
            PDO::ATTR_DEFAULT_FETCH_MODE    => PDO::FETCH_ASSOC,
            PDO::ATTR_EMULATE_PREPARES      => FALSE
        ];
        return new PDO($dsn,$username,$password,$opt);
    }
    // Send data to the database
    function sendData($pdo,$query,$arr) {
        $stmt = $pdo->prepare($query);
        $stmt->execute($arr);
        return 1;
    }
    // Gather data from the database
    function getData($pdo,$query,$arr) {
        $stmt = $pdo->prepare($query);
        $stmt->execute($arr);
        $data = $stmt->fetchColumn();
        return $data;
    }
    // Null the database connection to "close" the connection
    function close($pdo) {
        if(isset($pdo)) {
            $pdo = null;
        }
    }
}