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synced 2026-10-19 01:03:12 -04:00
27 lines
749 B
PHP
27 lines
749 B
PHP
<?php
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if (!$Viewer->permitted('users_view_ips')) {
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die('Access denied.');
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}
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if (isset($_SERVER['http_if_modified_since'])) {
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header('Status: 304 Not Modified');
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die();
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}
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header('Expires: '.date('D, d-M-Y H:i:s \U\T\C', time() + 3600 * 24 * 120)); //120 days
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header('Last-Modified: '.date('D, d-M-Y H:i:s \U\T\C', time()));
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if ($_GET['ip'] != long2ip(ip2long($_GET['ip']))) {
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die('Invalid IPv4 address.');
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}
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$Output = explode(' ', shell_exec('host -W 1 ' . escapeshellarg($_GET['ip'])));
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if (count($Output) == 1 && empty($Output[0])) {
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trigger_error('no output received: ensure that "host -W" functions correctly');
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} elseif (count($Output) != 5) {
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print 'Could not retrieve host.';
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} else {
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echo trim($Output[4]);
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}
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