跨数据库调用

include/taglib/sql.lib.php

<?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="#@__";
$sql = str_replace($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;
}

data/tag/sql.inc.php

<?php
global $sqltag;
// phpwind8数据库连接配置
// ------------------------------------------------------------------------
$sqltag['phpwind8']['dbhost'] = 'localhost';
$sqltag['phpwind8']['dbname'] = 'phpwind8';
$sqltag['phpwind8']['dbuser'] = 'root';
$sqltag['phpwind8']['dbpwd'] = '123456';
$sqltag['phpwind8']['dbprefix'] = 'pw_';
$sqltag['phpwind8']['dblanguage'] = 'gbk';

// phpb2b数据库连接配置
// ------------------------------------------------------------------------
$sqltag['lixincma_lsm1']['dbhost'] = 'localhost';　　//'数据库IP'
$sqltag['lixincma_lsm1']['dbname'] = 'lixincma_lsm1';　　//'数据库名称';
$sqltag['lixincma_lsm1']['dbuser'] = 'lixincma_lsm1';　　//'数据库用户名'
$sqltag['lixincma_lsm1']['dbpwd'] = 'lsm1lsm1';　　// '数据库密码'
$sqltag['lixincma_lsm1']['dbprefix'] = 'dede_';　　//'数据库表前缀，默许的为dede_'
$sqltag['lixincma_lsm1']['dblanguage'] = 'utf8';　　// '编码格局，如utf8、gb2312'
?>

在wwwlixinedu.cn中模板-》全局标记测试中测试：(lixincma_lsm3)

{dede:sql sql="SELECT * FROM `dede_admin`" appname="lixincma_lsm1"}
[field:uname/]
{/dede:sql}

测试结果：

这两个用户名是在另外一个站点lixinabe.com(lixincma_lsm1)的不同数据库中设置的：