[任务][理解]

/**
* 根据模板ID获得列表页子栏目
*
* @access public
* @param $tpl:模板id的值
* @return array
*/
function get_tpl_list_nav($tpl_id='',$is_content=0){
$lang=$GLOBALS['lang'];
global $cateid;
if(empty($tpl_id))
{
$cate = $GLOBALS['cat_id'];
}
else
{
$tpl_id = intval($tpl_id);//获得栏目模板ID，不存在获取内容页的栏目模板ID
$sql="SELECT id from ".DB_PRE."category WHERE lang='".$lang."' AND temp_id=".$tpl_id;
$cate_rel=$GLOBALS['mysql']->fetch_asc($sql);
$cate=empty($cate_rel[0]['id'])?$GLOBALS['cateid']:$cate_rel[0]['id'];
}
//如果当前栏目没有下级，存在上级则返回上级
if(!empty($cate)){
if(file_exists(DATA_PATH.'cache_cate/cache_category_all.php')){include(DATA_PATH.'cache_cate/cache_category_all.php');}
$cate_info=get_cate_info($cate,$category);
$child_num=$GLOBALS['mysql']->fetch_asc("select COUNT(id) as haschild from ".DB_PRE."category where cate_parent=".$cate);
$cate=($child_num[0]['haschild'])?$cate:$cate_info['cate_parent'];
}
if(!$cate){return;}
if(file_exists(DATA_PATH.'cache_cate/cate_list_'.$lang.'.php')){include(DATA_PATH.'cache_cate/cate_list_'.$lang.'.php');}//当前语言下的栏目
$nav_arr=array();
if(!empty($cate_list)){
foreach($cate_list as $k=>$v){
if($v['cate_parent']==$cate&&!$v['cate_hide']){
$cate_info=get_cate_info($v['id'],$category);
$channel_info = get_cate_info($v['cate_channel'],$GLOBALS['channel']);//获得栏目模型信息

$content_php=empty($channel_info['content_php'])?'show_content.php':$channel_info['content_php'];
$list_php=empty($channel_info['list_php'])?'show_list.php':$channel_info['list_php'];

$path=CMS_URL;
$nav_arr[$k]['target']=intval($v['cate_is_open'])?'target="_blank"':'';//新窗口
if($v['cate_tpl']==2){
$nav_arr[$k]['url']=$v['cate_url'];
}else{
$nav_arr[$k]['url']=(($v['cate_html'])&&($GLOBALS['_confing']['web_html'][0]))?$path.$v['cate_fold_name'].'.html':$path.$list_php.'?id='.$v['id'];
if($v['cate_tpl']==3){
$nav_arr[$k]['url']=($v['cate_html']&&$GLOBALS['_confing']['web_html'][0])?$path.$v['cate_fold_name'].'.html':$path.$list_php.'?id='.$v['id'];
}
}

if($v['id']==$cateid){
$nav_arr[$k]['class']="focus";
}


//开启内容获取选中栏目的推荐内容
if($is_content){
$content_sql = "SELECT*FROM ".DB_PRE."maintb WHERE category=".$v['id']." ORDER BY id DESC";
$content_rel = $GLOBALS['mysql']->fetch_asc($content_sql);

if(!empty($content_rel)){
foreach($content_rel as $ct_k=>$ct_v){
$html_url = empty($ct_v['custom_url'])?date('YmdHms',$ct_v['addtime']):$ct_v['custom_url'];//内容静态页面
if($ct_v['purview']){
$url2=$path.$content_php.'?id='.$ct_v['id'];
}else{
$url2=(!$ct_v['is_html']&&!($GLOBALS['_confing']['web_html'][0]))?$path.$content_php.'?id='.$ct_v['id']:$path.$cate_info['cate_fold_name'].'/'.$html_url.'.html';
}

$nav_arr[$k]['content'][$ct_k]['title'] = $ct_v['title'];
$nav_arr[$k]['content'][$ct_k]['url'] = ($ct_v['is_url'])?$ct_v['url_add']:$url2;//链接

}
}

}



$nav_arr[$k]['cate_name']=$v['cate_name'];
$nav_arr[$k]['cate_pic1']=empty($cate_info['cate_pic1'])?CMS_URL.'upload/no_pc.gif':CMS_URL.'upload/'.$cate_info['cate_pic1'];
$nav_arr[$k]['cate_pic2']=empty($cate_info['cate_pic2'])?CMS_URL.'upload/no_pc.gif':CMS_URL.'upload/'.$cate_info['cate_pic2'];
$nav_arr[$k]['cate_pic3']=empty($cate_info['cate_pic3'])?CMS_URL.'upload/no_pc.gif':CMS_URL.'upload/'.$cate_info['cate_pic3'];
$nav_arr[$k]['cate_content']=$cate_info['cate_content'];
$nav_arr[$k]['content_num'] = get_all_cate_content_num($v['id']);//获得栏目内容，包括子栏目
$nav_arr[$k]['id']=$v['id'];
$nav_arr[$k]['child']=get_child_cate($v['id'],$GLOBALS['lang'],$is_content);
}
}
}
if(!empty($nav_arr)){
$i=1;
$num=count($nav_arr);
foreach($nav_arr as $k=>$v){
$nav_arr[$k]['autoindex']=$i;
$nav_arr[$k]['first']=($i==1)?1:0;
$nav_arr[$k]['last']=($num==$i)?1:0;
$i=$i+1;
}
}
return $nav_arr;
}