<?php
define('IBVTE_ACCESS', true);
require_once __DIR__ . '/../config.php';
require_once __DIR__ . '/../includes/db.php';
$db = DB();
try {
    $db->execute("ALTER TABLE admit_cards ADD COLUMN custom_data TEXT NULL");
    echo "Column custom_data added successfully.\n";
} catch(Exception $e) {
    echo "Error (or already exists): " . $e->getMessage() . "\n";
}