以前在局域网安装的rocket theme，现在服务器改了ip放到公网 出现fopen错误，请站长帮忙看看，谢谢

打开所有rt模板时候都出错 rt_modulus - Default
fopen( update.joomla.org/jed/list.xml
): failed to open stream: php_network_getaddresses: getaddrinfo failed: Name or service not known
谢谢