friendica-github/src/Module/Diagnostic/Localtime.php

<?php

namespace Friendica\Module\Diagnostic;

use Friendica\BaseModule;
use Friendica\Core\Installer;
use Friendica\Core\L10n;
use Friendica\Util\DateTimeFormat;
use Friendica\Util\Temporal;

class Localtime extends BaseModule
{
	public static function post()
	{
		$time = defaults($_REQUEST, 'time', 'now');

		$bd_format = L10n::t('l F d, Y \@ g:i A');

		if (!empty($_POST['timezone'])) {
			self::getApp()->data['mod-localtime'] = DateTimeFormat::convert($time, $_POST['timezone'], 'UTC', $bd_format);
		}
	}

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

		$time = defaults($_REQUEST, 'time', 'now');

		$output  = '<h3>' . L10n::t('Time Conversion') . '</h3>';
		$output .= '<p>' . L10n::t('Friendica provides this service for sharing events with other networks and friends in unknown timezones.') . '</p>';
		$output .= '<p>' . L10n::t('UTC time: %s', $time) . '</p>';

		if (!empty($_REQUEST['timezone'])) {
			$output .= '<p>' . L10n::t('Current timezone: %s', $_REQUEST['timezone']) . '</p>';
		}

		if (!empty($app->data['mod-localtime'])) {
			$output .= '<p>' . L10n::t('Converted localtime: %s', $app->data['mod-localtime']) . '</p>';
		}

		$output .= '<form action ="' . $app->getBaseURL() . '/localtime?f=&time=' . $time . '" method="post" >';
		$output .= '<p>' . L10n::t('Please select your timezone:') . '</p>';
		$output .= Temporal::getTimezoneSelect(defaults($_REQUEST, 'timezone', Installer::DEFAULT_TZ));
		$output .= '<input type="submit" name="submit" value="' . L10n::t('Submit') . '" /></form>';

		return $output;
	}
}