array(3) {
  [0]=>
  string(21) "数据库链接出错"
  [1]=>
  int(2002)
  [2]=>
  string(71) "php_network_getaddresses: getaddrinfo failed: Name or service not known"
}
系统出现错误,请将错误编码告知管理员,并重试操作,错误编码:[]