PKPLocale::initialize PHP Method

    static function initialize($request)
    {
        self::$request = $request;
        // Use defaults if locale info unspecified.
        $locale = AppLocale::getLocale();
        $sysLocale = $locale . '.' . LOCALE_ENCODING;
        if (!@setlocale(LC_ALL, $sysLocale, $locale)) {
            // For PHP < 4.3.0
            if (setlocale(LC_ALL, $sysLocale) != $sysLocale) {
                setlocale(LC_ALL, $locale);
            }
        }
        AppLocale::registerLocaleFile($locale, "lib/pkp/locale/{$locale}/common.xml");
        // Set site time zone
        // Starting from PHP 5.3.0 PHP will throw an E_WARNING if the default
        // time zone is not set and date/time functions are used
        // http://pl.php.net/manual/en/function.date-default-timezone-set.php
        $timeZone = self::getTimeZone();
        date_default_timezone_set($timeZone);
        if (Config::getVar('general', 'installed')) {
            // Set the time zone for DB
            // Get the offset from UTC
            $now = new DateTime();
            $mins = $now->getOffset() / 60;
            $sgn = $mins < 0 ? -1 : 1;
            $mins = abs($mins);
            $hrs = floor($mins / 60);
            $mins -= $hrs * 60;
            $offset = sprintf('%+d:%02d', $hrs * $sgn, $mins);
            $conn = DBConnection::getInstance();
            $dbconn =& $conn->getDBConn();
            switch ($conn->getDriver()) {
                case 'mysql':
                case 'mysqli':
                    $dbconn->execute('SET time_zone = \'' . $offset . '\'');
                    break;
                case 'postgres':
                    $dbconn->execute('SET TIME ZONE INTERVAL \'' . $offset . '\' HOUR TO MINUTE');
                    break;
                default:
                    assert(false);
            }
        }
    }