<?php
function encryptText($text, $key) {
    $iv = random_bytes(16);
    $cipher = openssl_encrypt($text, 'AES-256-CBC', $key, 0, $iv);
    return [
        'cipher' => $cipher,
        'iv' => base64_encode($iv)
    ];
}
function decryptText($cipher, $iv, $key) {
    return openssl_decrypt($cipher, 'AES-256-CBC', $key, 0, base64_decode($iv));
}
function generateId() {
    return bin2hex(random_bytes(16));
}