如同想像，許多函數不支援了，所以要

1.把 x_base/adodb 換成新版(升級php7才要)

2.把mysql_都換成mysqli_(升級php7才要)

3.把2.5.10 /class/xoopsform/formtext.php換成2.5.7的

4.改良adodb不支援utf8的問題：
找到ADODB中的drivers目錄下的「adodb-mysql.inc.php」文件，修改其中的 _connect和 _pconnect两个函数，各增加以下代码：
+ @mysql_query("SET NAMES 'utf8'", $this->_connectionID);
即可，位置在SelectDB一行之前。

例如：

function _connect($argHostname, $argUsername, $argPassword, $argDatabasename)
 {
  if (!empty($this->port)) $argHostname .= ":".$this->port;
 
  if (ADODB_PHPVER >= 0x4300)
   $this->_connectionID = mysql_connect($argHostname,$argUsername,$argPassword,
            $this->forceNewConnect,$this->clientFlags);
  else if (ADODB_PHPVER >= 0x4200)
   $this->_connectionID = mysql_connect($argHostname,$argUsername,$argPassword,
            $this->forceNewConnect);
  else
   $this->_connectionID = mysql_connect($argHostname,$argUsername,$argPassword);

  if ($this->_connectionID === false) return false;
  + @mysql_query("SET NAMES 'utf8'", $this->_connectionID);
  if ($argDatabasename) return $this->SelectDB($argDatabasename);
  return true;
 }

 // returns true or false
 function _pconnect($argHostname, $argUsername, $argPassword, $argDatabasename)
 {
  if (!empty($this->port)) $argHostname .= ":".$this->port;
 
  if (ADODB_PHPVER >= 0x4300)
   $this->_connectionID = mysql_pconnect($argHostname,$argUsername,$argPassword,$this->clientFlags);
  else
   $this->_connectionID = mysql_pconnect($argHostname,$argUsername,$argPassword);
  if ($this->_connectionID === false) return false;
  if ($this->autoRollback) $this->RollbackTrans();
  + @mysql_query("SET NAMES 'utf8'", $this->_connectionID);
  if ($argDatabasename) return $this->SelectDB($argDatabasename);
  return true;
 }