<?php

/**
 * Validate a BIND zonefile using named-checkzone.
 *
 * @param string $zone      The zone name (e.g., example.com)
 * @param string $zonefile  Full path to the zonefile
 * @return string           Raw output from named-checkzone
 */
function validate_zone(string $zone, string $zonefile): string {
    $cmd = "named-checkzone " . escapeshellarg($zone) . " " . escapeshellarg($zonefile);

    // Capture both stdout and stderr
    $output = shell_exec($cmd . " 2>&1");

    // Ensure we always return a string
    return $output !== null ? $output : '';
}