织梦dedecms系统调用跨站跨数据库数据显示

<?php
if(!defined('DEDEINC'))
{
    exit("Request Error!");
}
/**
 * SQL标签
 *
 * @version        $Id: sql.lib.php 2 10:00 2010-11-11 tianya $
 * @package        DedeCMS.Taglib
 * @copyright      Copyright (c) 2007 - 2010, DesDev, Inc.
 * @license        http://help.dedecms.com/usersguide/license.html
 * @link           http://www.dedecms.com
 */

/*>>dede>>
<name>SQL标签</name>
<type>全局标记</type>
<for>V55,V56,V57</for>
<description>用于获取MySQL数据库内容的标签</description>
<demo>
{dede:sql sql='' db='default'}
[field:title/]
{/dede}
</demo>
<attributes>
    <iterm>sql:需要查询的sql语句</iterm>
    <iterm>appname: 默认为default,即当前dedecms的数据库,如果需要自定义,可以在data/tag/sql.inc.php中扩展,具体扩展方法查看配置文件头部说明</iterm>
</attributes>
>>dede>>*/

function lib_sql(&$ctag,&$refObj)
{
    global $dsql,$sqlCt,$cfg_soft_lang;
    $attlist="sql|appname";
    FillAttsDefault($ctag->CAttribute->Items,$attlist);
    extract($ctag->CAttribute->Items, EXTR_SKIP);

    //传递环境参数
    preg_match_all("/~([A-Za-z0-9]+)~/s", $sql, $conditions);
    $appname = empty($appname)? 'default' : $appname;
    if(is_array($conditions))
    {
        foreach ($conditions[1] as $key => $value)
        {
            if(isset($refObj->Fields[$value]))
            {
                $sql = str_replace($conditions[0][$key], "'".addslashes($refObj->Fields[$value])."'", $sql);
            }
        }
    }
    
    $revalue = '';
    $Innertext = trim($ctag->GetInnerText());

    if($sql=='' || $Innertext=='') return '';
    if(empty($sqlCt)) $sqlCt = 0;

    $ctp = new DedeTagParse();
    $ctp->SetNameSpace('field','[',']');
    $ctp->LoadSource($Innertext);
    $thisrs = 'sq'.$sqlCt;
    $GLOBALS['autoindex'] = 0;
    
    // 引入配置文件
    if ($appname != 'default')
    {
        require_once(DEDEDATA.'/tag/sql.inc.php');
        global $sqltag;
        $config = $sqltag[$appname];
        if (!isset($config['dbname'])) return '';
        
        // 链接数据库
        $linkid = @mysql_connect($config['dbhost'], $config['dbuser'], $config['dbpwd']);
        if(!$linkid) return '';
        @mysql_select_db($config['dbname']);
        $mysqlver = explode('.',$dsql->GetVersion());
        $mysqlver = $mysqlver[0].'.'.$mysqlver[1];
        
        // 设定数据库编码及长连接
        if($mysqlver > 4.0)
        {
            @mysql_query("SET NAMES '".$config['dblanguage']."', character_set_client=binary, sql_mode='', interactive_timeout=3600 ;", $linkid);
        }
        
        $prefix="dede_";
        $sql = str_replace($prefix, $config['dbprefix'], $sql);
        
        // 校验SQL字符串并获取数组返回
        $sql = CheckSql($sql);
        $rs = @mysql_query($sql, $linkid);
        while($row = mysql_fetch_array($rs,MYSQL_ASSOC))
        {
            $sqlCt++;
            $GLOBALS['autoindex']++;
            
            // 根据程序判断编码类型,并进行转码,这里主要就是gbk和utf-8
            if (substr($cfg_soft_lang, 0, 2) != substr($config['dblanguage'], 0, 2))
            {
                $row = AutoCharset($row, $config['dblanguage'], $cfg_soft_lang);
            }

            foreach($ctp->CTags as $tagid=>$ctag)
            {
                if($ctag->GetName()=='array')
                {
                    $ctp->Assign($tagid, $row);
                }
                else
                {
                    if( !empty($row[$ctag->GetName()])) 
                    { 
                        $ctp->Assign($tagid, $row[$ctag->GetName()]); 
                    } else { 
                      $ctp->Assign($tagid, ""); 
                    }
                }
            }
            $revalue .= $ctp->GetResult();
        }
        @mysql_free_result($rs);
        
    } else { 
        $dsql->Execute($thisrs, $sql);
        while($row = $dsql->GetArray($thisrs))
        {
            $sqlCt++;
            $GLOBALS['autoindex']++;
            foreach($ctp->CTags as $tagid=>$ctag)
            {
                if($ctag->GetName()=='array')
                {
                    $ctp->Assign($tagid,$row);
                }
                else
                {
                    if( !empty($row[$ctag->GetName()])) 
                    { 
                        $ctp->Assign($tagid,$row[$ctag->GetName()]); 
                    } else { 
                      $ctp->Assign($tagid,""); 
                    }
                }
            }
            $revalue .= $ctp->GetResult();
        }
    }
    return $revalue;
}