common.inc.php

<?php

require_once 'vendor/autoload.php';

use Battis\ConfigXML;
use smtech\StMarksSmarty\StMarksSmarty;

$smarty = StMarksSmarty::getSmarty();
$smarty->prependTemplateDir(__DIR__ . '/templates', basename(__DIR__));
$smarty->assign([
    'title' => 'Printable Forms',
    'category' => 'Printable Forms',
    'formAction'=> $_SERVER['PHP_SELF']
]);

$sql = (new ConfigXML(__DIR__ . '/config.xml'))->newInstanceOf(mysqli::class, '/config/mysql');