dede 调用四级导航

一、修改文件：include aglib目录下的channel.lib.php，请将以下代码全部复制替换上述文件

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<?php
function 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();
        $cacheid = trim($cacheid);
    if($cacheid !='') {
        $likeType = GetCacheBlock($cacheid);
        if($likeType != '') return $likeType;
    }
 
    $reid = 0;
    $topid = 0;
    if(empty($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 = $dsql->GetOne("Select reid From dede_arctype where id='$typeid' ");
        if(<a href="https://www.baidu.com/s?wd=is_array&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YLmHDkmWDsnju-nHb1rHTd0AP8IA3qPjfsn1bkrjKxmLKz0ZNzUjdCIZwsrBtEXh9GuA7EQhF9pywdQhPEUiqkIyN1IA-EUBtkPWm4P1nzrH63nWDzrHDzPjcL" target="_blank" class="baidu-highlight">is_array</a>($dbrow)) $reid = $dbrow['reid'];
    }
    $likeType = '';
    if($type=='top')
    {
        $sql = "Select id,typename,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description
          From dede_arctype where reid=0 And ishidden<>1 order by sortrank asc limit 0,$row";
    }
    else if($type=="son")
    {
        //if($_sys_globals['typeid']>0) $typeid = $_sys_globals['typeid'];
        if($typeid==0) {
            return '';
        }
        $sql = "Select id,typename,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description
          From dede_arctype where reid='$typeid' And ishidden<>1 order by sortrank asc limit 0,$row";
    }
    else if($type=="self")
    {
        if($reid==0) {
            return '';
        }
        $sql = "Select id,typename,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description
            From `dede_arctype` where reid='$reid' And ishidden<>1 order by sortrank asc limit 0,$row";
    }
    //And id<>'$typeid'
    $needRel = false;
    $dtp2 = new DedeTagParse();
    $dtp2->SetNameSpace("field","[","]");
    $dtp2->LoadSource($innertext);
    $dsql2 = clone $dsql;
    $dsql->SetQuery($sql);
    $dsql->Execute();
    $line = $row;
        //检查是否有子栏目，并返回rel提示（用于二级菜单）
    if(ereg(':rel', $innertext)) $needRel = true;
    
    if(empty($sql)) return '';
    $dsql->SetQuery($sql);
    $dsql->Execute();
    
    $totalRow = $dsql->GetTotalRow();
    $GLOBALS['autoindex'] = 0;
    for($i=0;$i < $line;$i++)
    {
        if($col>1) $likeType .= "<dl> ";
        for($j=0;$j<$col;$j++)
        {
            if($col>1) $likeType .= "<dd> ";
            if($row=$dsql->GetArray())
            {
                            $row['sonids'] = $row['rel'] = '';
                if($needRel)
                {
                    $row['sonids'] = GetSonIds($row['id'], 0, false);
                    if($row['sonids']=='') $row['rel'] = '';
                    else $row['rel'] = " rel='dropmenu{$row['id']}'";
                }
                //处理同级栏目中，当前栏目的样式
                if( ($row['id']==$typeid || ($topid==$row['id'] && $type=='top') ) && $currentstyle!='' )
                {
                    if($currentstyle!='')
                    {
                    $linkOkstr = $currentstyle;
                    $row['typelink'] = GetOneTypeUrlA($row);
                    $linkOkstr = <a href="https://www.baidu.com/s?wd=str_replace&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YLmHDkmWDsnju-nHb1rHTd0AP8IA3qPjfsn1bkrjKxmLKz0ZNzUjdCIZwsrBtEXh9GuA7EQhF9pywdQhPEUiqkIyN1IA-EUBtkPWm4P1nzrH63nWDzrHDzPjcL" target="_blank" class="baidu-highlight">str_replace</a>("~rel~",$row['rel'],$linkOkstr);
                    $linkOkstr = <a href="https://www.baidu.com/s?wd=str_replace&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YLmHDkmWDsnju-nHb1rHTd0AP8IA3qPjfsn1bkrjKxmLKz0ZNzUjdCIZwsrBtEXh9GuA7EQhF9pywdQhPEUiqkIyN1IA-EUBtkPWm4P1nzrH63nWDzrHDzPjcL" target="_blank" class="baidu-highlight">str_replace</a>("~id~",$row['id'],$linkOkstr);
                    $linkOkstr = <a href="https://www.baidu.com/s?wd=str_replace&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YLmHDkmWDsnju-nHb1rHTd0AP8IA3qPjfsn1bkrjKxmLKz0ZNzUjdCIZwsrBtEXh9GuA7EQhF9pywdQhPEUiqkIyN1IA-EUBtkPWm4P1nzrH63nWDzrHDzPjcL" target="_blank" class="baidu-highlight">str_replace</a>("~typelink~",$row['typelink'],$linkOkstr);
                    $linkOkstr = str_replace("~typename~",$row['typename'],$linkOkstr);
                    $likeType .= $linkOkstr;
                    }
                }else
                {
                    $row['typelink'] = $row['typeurl'] = GetOneTypeUrlA($row);
                    if(<a href="https://www.baidu.com/s?wd=is_array&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YLmHDkmWDsnju-nHb1rHTd0AP8IA3qPjfsn1bkrjKxmLKz0ZNzUjdCIZwsrBtEXh9GuA7EQhF9pywdQhPEUiqkIyN1IA-EUBtkPWm4P1nzrH63nWDzrHDzPjcL" target="_blank" class="baidu-highlight">is_array</a>($dtp2->CTags))
                    {
                        foreach($dtp2->CTags as $tagid=>$ctag){
                            if(isset($row[$ctag->GetName()]))
                            {
                                $dtp2->Assign($tagid,$row[$ctag->GetName()]);
                            }
                            elseif (<a href="https://www.baidu.com/s?wd=preg_match&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YLmHDkmWDsnju-nHb1rHTd0AP8IA3qPjfsn1bkrjKxmLKz0ZNzUjdCIZwsrBtEXh9GuA7EQhF9pywdQhPEUiqkIyN1IA-EUBtkPWm4P1nzrH63nWDzrHDzPjcL" target="_blank" class="baidu-highlight">preg_match</a>('/^sonchannel[0-9]*$/',$ctag->GetName()))
                            {
                                $dtp2->Assign($tagid,lib_channel_son($ctag,$row['id'],$dsql2));
                            }
                        }
                    }
                    $likeType .= $dtp2->GetResult();
                }
            }
            if($col>1) $likeType .= "</dd> ";
            $GLOBALS['autoindex']++;
        }//Loop Col
        if($col>1)
        {
            $i += $col - 1;
            $likeType .= "    </dl> ";
        }
    }//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 '';
    }
    $sql = "Select id,typename,typedir,isdefault,ispart,defaultname,namerule2,moresite,siteurl,sitepath,description
          From dede_arctype where reid='$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) $likeType .= "<dl> ";
        for($j=0;$j<$col;$j++)
        {
            if($col>1) $likeType .= "<dd> ";
            if($row=$dsql2->GetArray())
            {
                $row['typelink'] = $row['typeurl'] = GetOneTypeUrlA($row);
                if(<a href="https://www.baidu.com/s?wd=is_array&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YLmHDkmWDsnju-nHb1rHTd0AP8IA3qPjfsn1bkrjKxmLKz0ZNzUjdCIZwsrBtEXh9GuA7EQhF9pywdQhPEUiqkIyN1IA-EUBtkPWm4P1nzrH63nWDzrHDzPjcL" target="_blank" class="baidu-highlight">is_array</a>($dtp2->CTags))
                {
                    foreach($dtp2->CTags as $tagid=>$ctag){
                        if(isset($row[$ctag->GetName()]))
                        {
                            $dtp2->Assign($tagid,$row[$ctag->GetName()]);
                        }
                        elseif (<a href="https://www.baidu.com/s?wd=preg_match&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1YLmHDkmWDsnju-nHb1rHTd0AP8IA3qPjfsn1bkrjKxmLKz0ZNzUjdCIZwsrBtEXh9GuA7EQhF9pywdQhPEUiqkIyN1IA-EUBtkPWm4P1nzrH63nWDzrHDzPjcL" target="_blank" class="baidu-highlight">preg_match</a>('/^sonchannel[0-9]*$/',$ctag->GetName()))
                        {
                            $dtp2->Assign($tagid,lib_channel_son($ctag,$row['id'],$dsql3));
                        }
                    }
                }
                $likeType .= $dtp2->GetResult();
            }
            if($col>1) $likeType .= "</dd> ";
        }//Loop Col
        if($col>1)
        {
            $i += $col - 1;
            $likeType .= "    </dl> ";
        }
    }//Loop for $i
    reset($dsql3);
    $dsql2->FreeResult();
    return $likeType;
}
?>

在模板调用实例：

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{dede:channel type='son' typeid='3'}
              [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}
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原文地址：https://www.cnblogs.com/275147378abc/p/5062932.html