为dede:likearticle添加start channelid orderby等参数

dedecms中标签{dede:likearticle }{/dede:likearticle}默认不支持order by 和subway属性,因此对我们需要用此标签做自定义调用，比如用likearticle只调用点击高的文章，就实现不了，因此我们需要对该标签进行修改

源文件位置： include/taglib/likearticle.lib.php

1.orderby 属性

首先获得标签传递过来的orderby的属性值
$orderby=$ctag->GetAtt('orderby');
在源代码中有这样一组代码

if( empty($arcid) || $byabs==0 ) {   $orderquery = " order by arc.id desc ";}else {   $orderquery = " order by ABS(arc.id - ".$arcid.") ";}

likearticle标签默认的排序方式。赋予标签orderby属性那么这段代码就没意义了，先在源码中注释掉这段代码

直接延用默认的order by 子句变量$orderquery,这样sql语句就不用做更改了。
创建新变量 orderquery='';//mysql 查询语句中的order by子句 初始为空
然后根据传递的值做相应的判断，在这里只做一些最常用的值的判断
根据$orderby的值做不同的orderby 查询
if($orderby=='hot' || $orderby=='click') $orderquery = " order by arc.click $orderWay";
else if($orderby == 'sortrank' || $orderby=='pubdate') $orderquery = " order by arc.sortrank $orderWay";
else if($orderby == 'id') $orderquery = " order by arc.id $orderWay";
else if($orderby == 'near') $orderquery = " order by ABS(arc.id - ".$arcid.")";
else if($orderby == 'lastpost') $orderquery = " order by arc.lastpost $orderWay";
else if($orderby == 'scores') $orderquery = " order by arc.scores $orderWay";
else if($orderby == 'rand') $orderquery = " order by rand()";
else if($orderby == 'weight') $orderquery = " order by arc.weight asc";//如果没有特定设置排序则按照权重先排序
else $orderquery = " order by arc.sortrank $orderWay";


ok这样就为likearticle标签增加了完整的order by 属性

2.subday属性（标签获取subday指定的最近几天的数据）
同样先获得subday 的属性值
$subday=$ctag->GetAtt('subday');
然后做时间差计算

if($subday > 0)   {    $ntime = gmmktime(0, 0, 0, gmdate('m'), gmdate('d'), gmdate('Y'));    $limitday = $ntime - ($subday * 24 * 3600);    $subdaysql = " and arc.senddate > $limitday ";   }

然后在标签源码的两处sql查询语句中 增加$subdaysql子句判断
第一处为：

$query = "Select arc.*,tp.typedir,tp.typename,tp.corank,tp.isdefault,tp.defaultname,tp.namerule,           tp.namerule2,tp.ispart,tp.moresite,tp.siteurl,tp.sitepath            from `dede_archives` arc left join `dede_arctype` tp on arc.typeid=tp.id            where arc.arcrank>-1 and ($keyword) $typeid $orderquery limit 0, $row";

修改为:

$query = "Select arc.*,tp.typedir,tp.typename,tp.corank,tp.isdefault,tp.defaultname,tp.namerule,
           tp.namerule2,tp.ispart,tp.moresite,tp.siteurl,tp.sitepath
            from `dede_archives` arc left join `dede_arctype` tp on arc.typeid=tp.id
            where arc.arcrank>-1 and ($keyword) $typeid $subdaysql $orderquery limit 0, $row";
第二处为：
$query = "Select arc.*,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` arc left join `dede_arctype` tp on arc.typeid=tp.id
           where arc.arcrank>-1 and $typeid $orderquery limit 0, $row";
修改为：
$query = "Select arc.*,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` arc left join `dede_arctype` tp on arc.typeid=tp.id
           where arc.arcrank>-1 and $typeid $subdaysql $orderquery limit 0, $row";
做完以上更改就为likearticle标签增加了subday属性

以下为修改完之后的likearticle.lib.php的完整代码（增加了 orderby 和 subday 属性）

修改之后完整文件：

<?php   if(!defined('DEDEINC')) exit('Request Error!');  /**  * 自动关连文档标签  *  * @version        $Id: likearticle.lib.php 1 9:29 2010年7月6日Z 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>相关文档</name> <type>全局标记</type> <for>V55,V56,V57</for> <description>自动关连文档标签</description> <demo> {dede:likearticle row='' col='' titlelen='' infolen=''} <a href='[field:arcurl/]'>[field:title/]</a> {/dede:likearticle} </demo> <attributes>     <iterm>col:分多少列显示（默认为单列）</iterm>      <iterm>row:返回文档列表总数</iterm>     <iterm>titlelen:标题长度 等同于titlelength</iterm>     <iterm>infolen:表示内容简介长度 等同于infolength</iterm>     <iterm>mytypeid:手工指定要限定的栏目id，用,分开表示多个</iterm>     <iterm>innertext:单条记录样式(指标签中间的内容)</iterm> </attributes>  >>dede>>*/     function lib_likearticle(&$ctag,&$refObj)  {      global $dsql;            //属性处理      $attlist="row|12,titlelen|28,infolen|150,col|1,tablewidth|100,mytypeid|0,byabs|0,imgwidth|120,imgheight|90<span style="color:#ff0000;">,start|0,orderby|null,inword|*,channelid|*</span>";      FillAttsDefault($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."%";            $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);      }            $limitRow = $row - count($ids);      $keyword = '';      <span style="color:#ff0000;">if (empty($refObj->Fields['keywords']) && (! empty($inword)) && ($inword !='*') )      {         $refObj->Fields['keywords'] = $inword;      }</span>      if(!empty($refObj->Fields['keywords']))      {              $keywords = explode(',' , trim($refObj->Fields['keywords']));              $keyword = '';              $n = 1;              foreach($keywords as $k)              {                  if($n > 3)  break;                                     if(trim($k)=='') continue;                  else $k = addslashes($k);                                     $keyword .= ($keyword=='' ? " CONCAT(arc.keywords,' ',arc.title) LIKE '%$k%' " : " OR CONCAT(arc.keywords,' ',arc.title) LIKE '%$k%' ");                  $n++;              }      }      $arcid = (!empty($refObj->Fields['id']) ? $refObj->Fields['aid'] : 0);      if( empty($arcid) || $byabs==0 )      {                <span style="color:#ff6666;">switch ($orderby)          {//只能使用指定的列名            case 'typeid':            case 'typeid2':            case 'sortrank':            case 'channel':            case 'arcrank':            case 'click':            case 'title':            case 'shorttitle':            case 'writer':            case 'pubdate':            case 'senddate':                        case 'keywords':            case 'goodpost':            case 'badpost':            case 'notpost':              $orderby = 'arc.' . $orderby ;//连接,要允许使用连接表必须修改              break;            default:               $orderby = 'arc.id';          }</span>                $orderquery = " ORDER BY <span style="color:#ff0000;">{$orderby}</span> desc ";           }      else {          $orderquery = " ORDER BY ABS(arc.id - ".$arcid.") ";      }            <span style="color:#ff0000;">$start = (empty($start)?0:$start);            $channel_id = '';      //echo '<br>'.$channelid.'<br>';      if ( (!empty($channelid)) && preg_match("/^/-?/d+(,/-?/d+)*$/",$channelid) )      {//指定频道,必须是整数序列        $channel_id = " channel in($channelid) and ";      }      </span>            if($keyword != '')      {               if(!empty($typeid)) {                       $typeid = " AND arc.typeid IN($typeid) AND arc.id<>$arcid ";               }               $query = "SELECT arc.*,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` arc LEFT JOIN `dede_arctype` tp ON arc.typeid=tp.id                    where<span style="color:#ff0000;"> $channel_id </span> arc.arcrank>-1 AND ($keyword)  $typeid $orderquery limit <span style="color:#ff0000;">$start</span>, $row";      }      else      {              if(!empty($typeid)) {                      $typeid = " arc.typeid IN($typeid) AND arc.id<>$arcid ";              }              $query = "SELECT arc.*,tp.typedir,tp.typename,tp.corank,tp.isdefault,tp.defaultname,tp.namerule,                    tp.namerule2,tp.ispart,tp.moresite,tp.siteurl,tp.sitepath                    FROM `dede_archives` arc LEFT JOIN `dede_arctype` tp ON arc.typeid=tp.id                   WHERE <span style="color:#ff0000;">$channel_id</span> arc.arcrank>-1 AND  $typeid $orderquery limit <span style="color:#ff0000;">$start</span>,$row";      }     // exit($query);            $innertext = trim( $ctag->GetInnerText() );      if($innertext=='') $innertext = GetSysTemplets('part_arclist.htm');        $dsql->SetQuery($query);      $dsql->Execute('al');      $artlist = '';      if($col > 1) {          $artlist = "<table width='$tablewidth' border='0' cellspacing='0' cellpadding='0'>/r/n";      }      $dtp2 = new DedeTagParse();      $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) $artlist .= "    <td width='$colWidth'>/r/n";              if($row = $dsql->GetArray("al"))              {                  $ids[] = $row['id'];                  //处理一些特殊字段                  $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']);                  $row['typelink'] = "<a href='".$row['typeurl']."'>".$row['typename']."</a>";                  $row['image'] = "<img src='".$row['picname']."' border='0' width='$imgwidth' height='$imgheight' alt='".preg_replace("#['><]#","",$row['title'])."'>";                  $row['imglink'] = "<a href='".$row['filename']."'>".$row['image']."</a>";                  $row['fulltitle'] = $row['title'];                  $row['title'] = cn_substr($row['title'], $titlelen);                  if($row['color']!='') $row['title'] = "<font color='".$row['color']."'>".$row['title']."</font>";                  if(preg_match('#b#', $row['flag'])) $row['title'] = "<strong>".$row['title']."</strong>";                  $row['textlink'] = "<a href='".$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->CTags as $k=>$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";              }              //if hasRow              else              {                  $artlist .= '';              }              if($col>1) $artlist .= "    </td>/r/n";          }          //Loop Col          if($col>1) $i += $col - 1;          if($col>1) $artlist .= "    </tr>/r/n";      }      //loop line      if($col>1) $artlist .= "    </table>/r/n";      $dsql->FreeResult("al");      return $artlist;  }