} else {
C::t('common_cache')->delete('upgrade_step');
}
if (!intval($_GET['checking'])) {
cpmsg('upgrade_checking', 'action=upgrade&operation=check&checking=1', 'loading', '', false);
}
$discuz_upgrade->check_upgrade();
dheader('Location: ' . ADMINSCRIPT . '?action=upgrade&operation=showupgrade');
} elseif ($operation == 'showupgrade') {
shownav('tools', 'nav_founder_upgrade');
showsubmenu('nav_founder_upgrade');
showtableheader();
if (!$_G['setting']['upgrade']) {
cpmsg('upgrade_latest_version', '', 'succeed');
} else {
C::t('common_cache')->insert(array('cachekey' => 'upgrade_step', 'cachevalue' => serialize(array('curversion' => $discuz_upgrade->versionpath(), 'currelease' => DISCUZ_RELEASE)), 'dateline' => $_G['timestamp']), false, true);
$upgraderow = $patchrow = array();
$charset = str_replace('-', '', strtoupper($_G['config']['output']['charset']));
$dbversion = helper_dbtool::dbversion();
$locale = '';
if ($charset == 'BIG5') {
$locale = 'TC';
} elseif ($charset == 'GBK') {
$locale = 'SC';
} elseif ($charset == 'UTF8') {
if ($_G['config']['output']['language'] == 'zh_cn') {
$locale = 'SC';
} elseif ($_G['config']['output']['language'] == 'zh_tw') {
$locale = 'TC';
}
}