dede缩略图变成/www/wwwroot/域名这样的链接格式的解决办法

  /**   *  获得缩略图   *   * @access    public   * @param     string  $litpic  缩略图   * @param     string  $picname  图片名称   * @param     string  $isremote  是否远程   * @return    string   */  function GetDDImage($litpic, $picname, $isremote)  {      global $cuserLogin,$cfg_ddimg_width,$cfg_ddimg_height,$cfg_basedir,$ddcfg_image_dir,$cfg_addon_savetype;      $ntime = time();      if( ($litpic != 'none' || $litpic != 'ddfirst') &&        !empty($_FILES[$litpic]['tmp_name']) && is_uploaded_file($_FILES[$litpic]['tmp_name']))      {          //如果用户自行上传缩略图          $istype = 0;          $sparr = Array("image/pjpeg", "image/jpeg", "image/gif", "image/png");          $_FILES[$litpic]['type'] = strtolower(trim($_FILES[$litpic]['type']));          if(!in_array($_FILES[$litpic]['type'], $sparr))          {              ShowMsg("上传的图片格式错误，请使用JPEG、GIF、PNG格式的其中一种！","-1");              exit();          }          $savepath = $ddcfg_image_dir.'/'.MyDate($cfg_addon_savetype, $ntime);            CreateDir($savepath);          $fullUrl = $savepath.'/'.dd2char(MyDate('mdHis', $ntime).$cuserLogin->getUserID().mt_rand(1000, 9999));          if(strtolower($_FILES[$litpic]['type']) == "image/gif")          {              $fullUrl = $fullUrl.".gif";          }          else if(strtolower($_FILES[$litpic]['type']) == "image/png")          {              $fullUrl = $fullUrl.".png";          }          else          {              $fullUrl = $fullUrl.".jpg";          }            @move_uploaded_file($_FILES[$litpic]['tmp_name'], $cfg_basedir.$fullUrl);          $litpic = $fullUrl;            if($GLOBALS['cfg_ddimg_full']=='Y') @ImageResizeNew($cfg_basedir.$fullUrl,$cfg_ddimg_width,$cfg_ddimg_height);          else @ImageResize($cfg_basedir.$fullUrl,$cfg_ddimg_width,$cfg_ddimg_height);                    $img = $cfg_basedir.$litpic;        }      else      {            $picname = trim($picname);          if($isremote==1 && preg_match("#^http://#i", $picname))          {              $litpic = $picname;              $ddinfos = GetRemoteImage($litpic, $cuserLogin->getUserID());                if(!is_array($ddinfos))              {                  $litpic = '';              }              else              {                  $litpic = $ddinfos[0];                  if($ddinfos[1] > $cfg_ddimg_width || $ddinfos[2] > $cfg_ddimg_height)                  {                      if($GLOBALS['cfg_ddimg_full']=='Y') @ImageResizeNew($cfg_basedir.$litpic,$cfg_ddimg_width,$cfg_ddimg_height);                      else @ImageResize($cfg_basedir.$litpic,$cfg_ddimg_width,$cfg_ddimg_height);                  }              }          }          else          {              if($litpic=='ddfirst' && !preg_match("#^http://#i", $picname))              {                  $oldpic = $cfg_basedir.$picname;                  $litpic = str_replace('.', '-lp.', $picname);                  if($GLOBALS['cfg_ddimg_full']=='Y') @ImageResizeNew($oldpic,$cfg_ddimg_width,$cfg_ddimg_height,$cfg_basedir.$litpic);                  else @ImageResize($oldpic,$cfg_ddimg_width,$cfg_ddimg_height,$cfg_basedir.$litpic);                  if(!is_file($cfg_basedir.$litpic)) $litpic = $oldpic;               }              else              {                  $litpic = $picname;                  return $litpic;              }          }      }      if($litpic=='litpic' || $litpic=='ddfirst') $litpic = '';      return $litpic;  }