/**
* Elgg upgrade script.
*
* This script triggers any necessary upgrades. If the site has been upgraded
* to the most recent version of the code, no upgrades are run but the caches
* are flushed.
*
* Upgrades use a table {db_prefix}upgrade_lock as a mutex to prevent concurrent upgrades.
*
* The URL to forward to after upgrades are complete can be specified by setting $_GET['forward']
* to a relative URL.
*
* @return void
*/
public static function upgrade()
{
// we want to know if an error occurs
ini_set('display_errors', 1);
define('UPGRADING', 'upgrading');
self::start();
$site_url = elgg_get_config('url');
$site_host = parse_url($site_url, PHP_URL_HOST) . '/';
// turn any full in-site URLs into absolute paths
$forward_url = get_input('forward', '/admin', false);
$forward_url = str_replace(array($site_url, $site_host), '/', $forward_url);
if (strpos($forward_url, '/') !== 0) {
$forward_url = '/' . $forward_url;
}
if (get_input('upgrade') == 'upgrade') {
$upgrader = new \Elgg\UpgradeService();
$result = $upgrader->run();
if ($result['failure'] == true) {
register_error($result['reason']);
forward($forward_url);
}
} else {
$rewriteTester = new \ElggRewriteTester();
$url = elgg_get_site_url() . "__testing_rewrite?__testing_rewrite=1";
if (!$rewriteTester->runRewriteTest($url)) {
// see if there is a problem accessing the site at all
// due to ip restrictions for example
if (!$rewriteTester->runLocalhostAccessTest()) {
// note: translation may not be available until after upgrade
$msg = elgg_echo("installation:htaccess:localhost:connectionfailed");
if ($msg === "installation:htaccess:localhost:connectionfailed") {
$msg = "Elgg cannot connect to itself to test rewrite rules properly. Check " . "that curl is working and there are no IP restrictions preventing " . "localhost connections.";
}
echo $msg;
exit;
}
// note: translation may not be available until after upgrade
$msg = elgg_echo("installation:htaccess:needs_upgrade");
if ($msg === "installation:htaccess:needs_upgrade") {
$msg = "You must update your .htaccess file so that the path is injected " . "into the GET parameter __elgg_uri (you can use install/config/htaccess.dist as a guide).";
}
echo $msg;
exit;
}
$vars = array('forward' => $forward_url);
// reset cache to have latest translations available during upgrade
elgg_reset_system_cache();
echo elgg_view_page(elgg_echo('upgrading'), '', 'upgrade', $vars);
exit;
}
forward($forward_url);
}