<?php
require_once __DIR__ . '/../config/config.php';
try {
    $db = Database::getInstance();
    $ids = [3];
    $placeholders = implode(',', array_fill(0, count($ids), '?'));
    $existing = $db->fetchAll("SELECT id, name, template_name FROM message_templates WHERE id IN ($placeholders)", $ids);
    var_export($existing);
} catch (Exception $e) {
    echo "Exception: " . $e->getMessage() . PHP_EOL;
}