PHP cls_mysql::error示例

/**
 * 安装完成后的一些善后处理
 *
 * @access  public
 * @return  boolean     成功返回true，失败返回false
 */
function deal_aftermath()
{
    global $err, $_LANG;

    include(ROOT_PATH . 'data/config.php');
    include_once(ROOT_PATH . 'includes/cls_ecshop.php');
    include_once(ROOT_PATH . 'includes/cls_mysql.php');

    $db = new cls_mysql($db_host, $db_user, $db_pass, $db_name);

    /* 初始化友情链接
    $sql = "INSERT INTO $prefix"."friend_link ".
                "(link_name, link_url, link_logo, show_order)".
            "VALUES ".
                "('".$_LANG['default_friend_link']."', 'http://www.ecshop.com/', 'http://www.ecshop.com/images/logo/ecshop_logo.gif','0')";
    if (!$db->query($sql, 'SILENT'))
    {
        $err->add($db->errno() .' '. $db->error());
    }

    $sql = "INSERT INTO $prefix"."friend_link ".
                "(link_name, link_url, show_order)".
            "VALUES ".
                "('".$_LANG['maifou_friend_link']."', 'http://www.maifou.net/','1')";
    if (!$db->query($sql, 'SILENT'))
    {
        $err->add($db->errno() .' '. $db->error());
    }*/

    /* 更新 ECSHOP 安装日期 */
    $sql = "UPDATE $prefix"."shop_config SET value='" .time(). "' WHERE code='install_date'";
    if (!$db->query($sql, 'SILENT'))
    {
        $err->add($db->errno() .' '. $db->error());
    }

    /* 更新 ECSHOP 版本 */
    $sql = "UPDATE $prefix"."shop_config SET value='" .VERSION. "' WHERE code='ecs_version'";
    if (!$db->query($sql, 'SILENT'))
    {
        $err->add($db->errno() .' '. $db->error());
        return false;
    }

    /* 写入 hash_code，做为网站唯一性密钥 */
    $hash_code = md5(md5(time()) . md5($db->dbhash) . md5(time()));
    $sql = "UPDATE $prefix"."shop_config SET value = '$hash_code' WHERE code = 'hash_code' AND value = ''";
    if (!$db->query($sql, 'SILENT'))
    {
        $err->add($db->errno() .' '. $db->error());
        return false;
    }

    /* 写入安装锁定文件 */
    $fp = @fopen(ROOT_PATH . 'data/install.lock', 'wb+');
    if (!$fp)
    {
        $err->add($_LANG['open_installlock_failed']);
        return false;
    }
    if (!@fwrite($fp, "TRADE SHOP INSTALLED"))
    {
        $err->add($_LANG['write_installlock_failed']);
        return false;
    }
    @fclose($fp);

    return true;
}