dedecms调用指定模板源码分析

function GetTempletFile()    {        global $cfg_basedir,$cfg_templets_dir,$cfg_df_style;        $cid = $this->ChannelUnit->ChannelInfos['nid'];        if(!empty($this->Fields['templet']))        {            $filetag = MfTemplet($this->Fields['templet']);          //  if( !preg_match("#//#", $filetag) ) $filetag = $GLOBALS['cfg_df_style'].'/'.$filetag;        }        else        {            $filetag = MfTemplet($this->TypeLink->TypeInfos["temparticle"]);        }        $tid = $this->Fields['typeid'];        $filetag = str_replace('{cid}', $cid,$filetag);        $filetag = str_replace('{tid}', $tid,$filetag);        $tmpfile = $cfg_basedir.$cfg_templets_dir.'/'.$filetag;        if($cid=='spec')        {            if( !empty($this->Fields['templet']) )            {                $tmpfile = $cfg_basedir.$cfg_templets_dir.'/'.$filetag;            }            else            {                $tmpfile = $cfg_basedir.$cfg_templets_dir."/{$cfg_df_style}/article_spec.htm";            }        }        if(!file_exists($tmpfile))        {            $tmpfile = $cfg_basedir.$cfg_templets_dir."/{$cfg_df_style}/".($cid=='spec' ? 'article_spec.htm' : 'article_default.htm');        }        if (!preg_match("#.htm$#", $tmpfile)) return FALSE;        return $tmpfile;    }