friendica/util/maintenance.php

<?php
/**
 * @file util/maintenance.php
 */
use Friendica\App;
use Friendica\Core\Config;
use Friendica\Core\L10n;

require_once 'boot.php';
require_once 'include/dba.php';

if (empty($a)) {
	$a = new App(dirname(__DIR__));
}

@include(".htconfig.php");

$lang = L10n::getBrowserLanguage();
L10n::loadTranslationTable($lang);

dba::connect($db_host, $db_user, $db_pass, $db_data, false);
unset($db_host, $db_user, $db_pass, $db_data);

Config::load();

$maint_mode = 1;
if ($argc > 1) {
	$maint_mode = intval($argv[1]);
}

Config::set('system', 'maintenance', $maint_mode);

if ($maint_mode && ($argc > 2)) {
	$reason_arr = $argv;
	array_shift($reason_arr);
	array_shift($reason_arr);

	$reason = implode(' ', $reason_arr);
	Config::set('system', 'maintenance_reason', $reason);
} else {
	Config::set('system', 'maintenance_reason', '');
}

if ($maint_mode) {
	$mode_str = "maintenance mode";
} else {
	$mode_str = "normal mode";
}

echo "\n\tSystem set in $mode_str\n";

if ($reason != '') {
	echo "\tMaintenance reason: $reason\n\n";
} else {
	echo "\n";
}

echo "Usage:\n\n";
echo "\tphp {$argv[0]} [1] [Maintenance reason|redirection url]\n";
echo "\t\tSet the system in maintenance mode\n\n";
echo "\t\tIf the optionally entered maintenance reason is an url\n";
echo "\t\tthe visitor is redirected to that page.\n";
echo "\n";
echo "\t\tExamples:\n";
echo "\t\t\tphp {$argv[0]} 1 System upgrade\n";
echo "\t\t\tphp {$argv[0]} 1 http://domain.tld/downtime\n";
echo "\n";
echo "\tphp {$argv[0]} 0\n";
echo "\t\tSet the system in normal mode\n\n";