我们在做织梦模板开发时，为了更好的利于seo，在每篇文章下调用与这篇文章有着相同tag或keyword的相关文章。为了实现这个功能，自定义了一个标签：dede:liketags。标签代码如下：

自定义标签代码

1、新建一个文件名称为liketags.lib.php，存放在/include/taglib/目录下。该文件代码如下：

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<?php
if(!defined('DEDEINC'))exit('RequestError!');
functionlib_liketags(&$ctag,&$refObj)
{
global$dsql;
//属性处理
$attlist="row|12,titlelen|30,infolen|250,col|1,tablewidth|100,mytypeid|0,byabs|0,imgwidth|120,imgheight|90,flag|";
FillAttsDefault($ctag->CAttribute->Items,$attlist);
extract($ctag->CAttribute->Items,EXTR_SKIP);
$revalue='';
if(empty($tablewidth))$tablewidth=100;
if(empty($col))$col=1;
$colWidth=ceil(100/$col);
$tablewidth=$tablewidth."%";
$colWidth=$colWidth."%";
$orwheres='';
if($flag!=''){
$flags=explode(',',$flag);
for($i=0;isset($flags[$i]);$i++)$orwheres.="ANDFIND_IN_SET('{$flags[$i]}',arc.flag)>0";
}
$ids=array();
$tids=array();
if(!empty($refObj->Fields['tags'])){
$keyword=$refObj->Fields['tags'];
}
else{
$keyword=(!empty($refObj->Fields['keywords'])?$refObj->Fields['keywords']:'');
}
$typeid=(!empty($mytypeid)?$mytypeid:0);
if(empty($typeid))
{
if(!empty($refObj->Typelink->TypeInfos['reid'])){
$typeid=$refObj->Typelink->TypeInfos['reid'];
}
else{
if(!empty($refObj->Fields['typeid']))$typeid=$refObj->Fields['typeid'];
}
}
if(!empty($typeid)&&!preg_match('#,#',$typeid)){
$typeid=GetSonIds($typeid);
}
if(!empty($refObj->Fields['tags'])&&$eregtype!='keyword')
{
$tags=explode(',',addslashes($refObj->Fields['tags']));
$getsql="taglike'".join("'ORtaglike'",$tags)."'";
$dsql->Execute('me',"Select*From`dede_tagindex`where$getsql");
while($arow=$dsql->GetArray('me'))
{
$tids[]=$arow['id'];
}
$tid=join(',',$tids);
if($tid!='')
{
$dsql->Execute("me","SelectaidFrom`dede_taglist`wheretidin($tid)Andarcrank>-1groupbyaidorderbyaiddesc");
while($arow=$dsql->GetArray("me"))
{
$ids[]=$arow['aid'];
$arcid=$refObj->Fields['aid'];
}
}
}
if($eregtype=='tag'&&count($ids)==0)
{
return;
}
else
{
if(count($ids)>0)
{
if(!empty($typeid))
{
$typeid="Andarc.typeidin($typeid)Andarc.id<>$arcid";
}
$idsStr=join(',',$ids);
$query="Selectarc.*,tp.typedir,tp.typename,tp.corank,tp.isdefault,tp.defaultname,tp.namerule,
tp.namerule2,tp.ispart,tp.moresite,tp.siteurl,tp.sitepath
from`dede_archives`arcleftjoin`dede_arctype`tponarc.typeid=tp.id
wherearc.idin($idsStr)$typeidorderbyarc.iddesclimit0,$row";
}
else
{
$limitRow=$row-count($ids);
$keyword='';
if(!empty($refObj->Fields['keywords']))
{
$keywords=explode(',',trim($refObj->Fields['keywords']));
$keyword='';
$n=1;
foreach($keywordsas$k)
{
if($n>3)break;
if(trim($k)=='')continue;
else$k=addslashes($k);
$keyword.=($keyword==''?"CONCAT(arc.keywords,'',arc.title)like'%$k%'":"ORCONCAT(arc.keywords,'',arc.title)like'%$k%'");
$n++;
}
}
$arcid=(!empty($refObj->Fields['id'])?$refObj->Fields['aid']:0);
if(empty($arcid)||$byabs==0)
{
$orderquery="orderbyarc.iddesc";
}
else
{
$orderquery="orderbyABS(arc.id-".$arcid.")";
}
if($keyword!='')
{
if(!empty($typeid))
{
$typeid="Andarc.typeidin($typeid)Andarc.id<>$arcid";
}
$query="Selectarc.*,tp.typedir,tp.typename,tp.corank,tp.isdefault,tp.defaultname,tp.namerule,
tp.namerule2,tp.ispart,tp.moresite,tp.siteurl,tp.sitepath
from`dede_archives`arcleftjoin`dede_arctype`tponarc.typeid=tp.id
wherearc.arcrank>-1and($keyword)$typeid$orderquerylimit0,$row";
}
else
{
if(!empty($typeid))
{
$typeid="arc.typeidin($typeid)Andarc.id<>$arcid";
}
$query="Selectarc.*,tp.typedir,tp.typename,tp.corank,tp.isdefault,tp.defaultname,tp.namerule,
tp.namerule2,tp.ispart,tp.moresite,tp.siteurl,tp.sitepath
from`dede_archives`arcleftjoin`dede_arctype`tponarc.typeid=tp.id
wherearc.arcrank>-1and$typeid$orderquerylimit0,$row";
}
}
}
$innertext=trim($ctag->GetInnerText());
if($innertext=='')$innertext=GetSysTemplets('part_arclist.htm');
$dsql->SetQuery($query);
$dsql->Execute('al');
$artlist='';
if($col>1){
$artlist="<tablewidth='$tablewidth'border='0'cellspacing='0'cellpadding='0'>\r\n";
}
$dtp2=newDedeTagParse();
$dtp2->SetNameSpace('field','[',']');
$dtp2->LoadString($innertext);
$GLOBALS['autoindex']=0;
$line=$row;
for($i=0;$i<$line;$i++)
{
if($col>1)$artlist.="<tr>\r\n";
for($j=0;$j<$col;$j++)
{
if($col>1)$artlist.="<tdwidth='$colWidth'>\r\n";
if($row=$dsql->GetArray("al"))
{
$ids[]=$row['id'];
//处理一些特殊字段www.dede58.com织梦模板网
$row['info']=$row['infos']=cn_substr($row['description'],$infolen);
$row['id']=$row['id'];
if($row['corank']>0&&$row['arcrank']==0)
{
$row['arcrank']=$row['corank'];
}
$row['filename']=$row['arcurl']=GetFileUrl($row['id'],$row['typeid'],$row['senddate'],$row['title'],$row['ismake'],
$row['arcrank'],$row['namerule'],$row['typedir'],$row['money'],$row['filename'],$row['moresite'],$row['siteurl'],$row['sitepath']);
$row['typeurl']=GetTypeUrl($row['typeid'],$row['typedir'],$row['isdefault'],$row['defaultname'],$row['ispart'],
$row['namerule2'],$row['moresite'],$row['siteurl'],$row['sitepath']);
if($row['litpic']=='-'||$row['litpic']=='')
{
$row['litpic']=$GLOBALS['cfg_cmspath'].'/images/defaultpic.gif';
}
if(!preg_match("#^http:\/\/#i",$row['litpic'])&&$GLOBALS['cfg_multi_site']=='Y')
{
$row['litpic']=$GLOBALS['cfg_mainsite'].$row['litpic'];
}
$row['picname']=$row['litpic'];
$row['stime']=GetDateMK($row['pubdate']);
$row['typelink']="<ahref='".$row['typeurl']."'>".$row['typename']."</a>";
$row['image']="<imgsrc='".$row['picname']."'border='0'width='$imgwidth'height='$imgheight'alt='".preg_replace("#['><]#","",$row['title'])."'>";
$row['imglink']="<ahref='".$row['filename']."'>".$row['image']."</a>";
$row['fulltitle']=$row['title'];
$row['title']=cn_substr($row['title'],$titlelen);
if($row['color']!='')$row['title']="<fontcolor='".$row['color']."'>".$row['title']."</font>";
if(preg_match('#b#',$row['flag']))$row['title']="<strong>".$row['title']."</strong>";
$row['textlink']="<ahref='".$row['filename']."'>".$row['title']."</a>";
$row['plusurl']=$row['phpurl']=$GLOBALS['cfg_phpurl'];
$row['memberurl']=$GLOBALS['cfg_memberurl'];
$row['templeturl']=$GLOBALS['cfg_templeturl'];
if(is_array($dtp2->CTags))
{
foreach($dtp2->CTagsas$k=>$ctag)
{
if($ctag->GetName()=='array'){
$dtp2->Assign($k,$row);
}
else{
if(isset($row[$ctag->GetName()]))$dtp2->Assign($k,$row[$ctag->GetName()]);
else$dtp2->Assign($k,'');
}
}
$GLOBALS['autoindex']++;
}
$artlist.=$dtp2->GetResult()."\r\n";
}
//ifhasRow
else
{
$artlist.='';
}
if($col>1)$artlist.="</td>\r\n";
}
//LoopCol
if($col>1)$i+=$col-1;
if($col>1)$artlist.="</tr>\r\n";
}
//loopline
if($col>1)$artlist.="</table>\r\n";
$dsql->FreeResult("al");
return$artlist;
}

前台模板调用代码如下：

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{dede:liketagsrow='3'mytypeid='6'eregtype='all|tag|keyword'titlelen='250'infolen='250'}
<li>
<ahref="[field:arcurl/]"title="[field:title/]"target="_blank">
<divclass="list-img">
<imgsrc="[field:litpic/]"alt="[field:title/]"/>
</div>
<divclass="list-info">
<pclass="title">[field:title/]</p>
<pclass="meta">[field:description/]</p>
</div>
</a>
</li>
{/dede:liketags}

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