织梦实现三级多级栏目嵌套调用教程

将三级目录全部显示出来，而系统的channel标签只能获取下级分类，所以就报改了channel.lib.php这个文件，让他支持多级栏目嵌套，代码如下：

<?phpfunction lib_channel(&$ctag,&$refObj){    global $_sys_globals,$envs,$dsql;    $attlist = "typeid|0,reid|0,row|100,col|1,type|son,currentstyle|";    FillAttsDefault($ctag->CAttribute->Items,$attlist);    extract($ctag->CAttribute->Items, EXTR_SKIP);    $innertext = $ctag->GetInnerText();    if(empty($typeid) && $envs['typeid']!=0)    {        $typeid = $envs['typeid'];        $reid = $envs['reid'];    }else{        $reid=0;    }    if($type==''||$type=='sun') $type="son";    if($innertext=='') $innertext = GetSysTemplets("channel_list.htm");    if($reid==0 && $typeid>0)    {        $dbrow = $dsql->GetOne("Select reid From net_arctype where id='$typeid' ");        if(is_array($dbrow)) $reid = $dbrow['reid'];    }    $likeType = '';    if($type=='top')    {        $sql = "Select id,typename,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description          From net_arctype where reid=0 And ishidden<>1 order by sortrank asc limit 0,$row";    }    else if($type=="son")    {        //if($_sys_globals['typeid']>0) $typeid = $_sys_globals['typeid'];        if($typeid==0) {            return '';        }        $sql = "Select id,typename,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description          From net_arctype where reid='$typeid' And ishidden<>1 order by sortrank asc limit 0,$row";    }    else if($type=="self")    {        if($reid==0) {            return '';        }        $sql = "Select id,typename,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description            From `net_arctype` where reid='$reid' And ishidden<>1 order by sortrank asc limit 0,$row";    }    //And id<>'$typeid'    $dtp2 = new DedeTagParse();    $dtp2->SetNameSpace("field","[","]");    $dtp2->LoadSource($innertext);    $dsql2 = clone $dsql;    $dsql->SetQuery($sql);    $dsql->Execute();    $line = $row;    $GLOBALS['autoindex'] = 0;    for($i=0;$i < $line;$i++)    {        if($col>1) $likeType .= "<dl>/r/n";        for($j=0;$j<$col;$j++)        {            if($col>1) $likeType .= "<dd>/r/n";            if($row=$dsql->GetArray())            {                if($type=='self' && $row['id']==$typeid) //处理同级栏目中，当前栏目的样式                {                    if($currentstyle!='')                    {                        $linkOkstr = $currentstyle;                        $row['typelink'] = GetOneTypeUrlA($row);                        $linkOkstr = str_replace("~typelink~",$row['typelink'],$linkOkstr);                        $linkOkstr = str_replace("~typename~",$row['typename'],$linkOkstr);                        $likeType .= $linkOkstr;                    }                }else                {                    $row['typelink'] = $row['typeurl'] = GetOneTypeUrlA($row);                    if(is_array($dtp2->CTags))                    {                        foreach($dtp2->CTags as $tagid=>$ctag){                            if(isset($row[$ctag->GetName()]))                            {                                $dtp2->Assign($tagid,$row[$ctag->GetName()]);                            }                            elseif (preg_match('/^sonchannel[0-9]*$/',$ctag->GetName()))                            {                                $dtp2->Assign($tagid,lib_channel_son($ctag,$row['id'],$dsql2));                            }                        }                    }                    $likeType .= $dtp2->GetResult();                }            }            if($col>1) $likeType .= "</dd>/r/n";            $GLOBALS['autoindex']++;        }//Loop Col        if($col>1)        {            $i += $col - 1;            $likeType .= "    </dl>/r/n";        }    }//Loop for $i    reset($dsql2);    $dsql->FreeResult();    return $likeType;}function lib_channel_son($ctag,$typeid = 0,$dsql2){    $attlist = "row|100,col|1,currentstyle|";    FillAttsDefault($ctag->CAttribute->Items,$attlist);    extract($ctag->CAttribute->Items, EXTR_SKIP);    $innertext = $ctag->GetInnerText();    $dsql3 = clone $dsql2;    $likeType = '';    //if($_sys_globals['typeid']>0) $typeid = $_sys_globals['typeid'];    if($typeid==0) {        return '';    }    $sql = "Select id,typename,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description          From net_arctype where reid='$typeid' And ishidden<>1 order by sortrank asc limit 0,$row";    //And id<>'$typeid'    $dtp2 = new DedeTagParse();    $dtp2->SetNameSpace("field","[","]");    $dtp2->LoadSource($innertext);    $dsql2->SetQuery($sql);    $dsql2->Execute();    $line = $row;    for($i=0;$i < $line;$i++)    {        if($col>1) $likeType .= "<dl>/r/n";        for($j=0;$j<$col;$j++)        {            if($col>1) $likeType .= "<dd>/r/n";            if($row=$dsql2->GetArray())            {                $row['typelink'] = $row['typeurl'] = GetOneTypeUrlA($row);                if(is_array($dtp2->CTags))                {                    foreach($dtp2->CTags as $tagid=>$ctag){                        if(isset($row[$ctag->GetName()]))                        {                            $dtp2->Assign($tagid,$row[$ctag->GetName()]);                        }                        elseif (preg_match('/^sonchannel[0-9]*$/',$ctag->GetName()))                        {                            $dtp2->Assign($tagid,lib_channel_son($ctag,$row['id'],$dsql3));                        }                    }                }                $likeType .= $dtp2->GetResult();            }            if($col>1) $likeType .= "</dd>/r/n";        }//Loop Col  www.dede58.com        if($col>1)        {            $i += $col - 1;            $likeType .= "    </dl>/r/n";        }    }//Loop for $i    reset($dsql3);    $dsql2->FreeResult();    return $likeType;}?>

将以上代码全部替换channel.lib.php文件内容后就可以了，附前端调用的示例：

{dede:channel type='top'}[field:typename/]<ul>[field:sonchannel0]<li><a href="[field:typelink/]">[field:typename/]</a></li>[field:sonchannel1]<li><a href="[field:typelink/]">---[field:typename/]</a></li>[field:sonchannel2]<li><a href="[field:typelink/]">===[field:typename/]</a></li>[field:sonchannel3]<li><a href="[field:typelink/]">===[field:typename/]</a></li>[/field:sonchannel3][/field:sonchannel2][/field:sonchannel1][/field:sonchannel0]</ul>{/dede:channel}