friendica/src/Module/WebFinger.php

<?php

namespace Friendica\Module;

use Friendica\BaseModule;
use Friendica\Core\L10n;
use Friendica\Core\Renderer;
use Friendica\Core\System;
use Friendica\Network\Probe;

/**
 * Web based module to perform webfinger probing
 */
class WebFinger extends BaseModule
{
	public static function init()
	{
		if (!local_user()) {
			System::httpExit(
				403,
				[
					'title'       => L10n::t('Public access denied.'),
					'description' => L10n::t('Only logged in users are permitted to perform a probing.'),
				],
			);
			exit();
		}
	}

	public static function content()
	{
		$app = self::getApp();

		$addr = defaults($_GET, 'addr', '');
		$res = '';

		if (!empty($addr)) {
			$res = Probe::lrdd($addr);
			$res = print_r($res, true);
		}

		$tpl = Renderer::getMarkupTemplate('webfinger.tpl');
		return Renderer::replaceMacros($tpl, [
			'$addr' => $addr,
			'$res'  => $res,
		]);
	}
}