分享下最近写的smarty模版引擎输出二级分类代码，主要是靠二维数组进行控制输出。
二级分类的数据表结构如下：
代码如下:PHP代码如下/**@ 文章分类 含二级分类@ param int $rootnum -- 一级分类数量@ param int $childnum -- 二级分类数量@ 返回值 array@ date 2011.2.24*/ function temp_articletreecate($rootnum,$childnum){if(!isnumber($rootnum)){$rootnum = 10;}if(!isnumber($childnum)){$childnum = 10;}$category = array();$parent_sql = "SELECT cateid,catename FROM ".TABLE_PREFIX."articlecate WHERE parentid=0 AND depth=0 AND flag=1 ORDER BY orders ASC";if(intval($rootnum)>0){$parent_sql.=" LIMIT $rootnum";}$parent_cate = $GLOBALS['db']->getall($parent_sql);foreach($parent_cate as $parent_key => $parent_value){//子类数组名为 childcategory 根据情况自定义名称$category[] = array('cateid'=>$parent_value['cateid'],'catename'=>$parent_value['catename'],'childcategory'=>array());//读取子类$child_sql = "SELECT cateid,catename FROM ".TABLE_PREFIX."articlecate WHERE parentid=".$parent_value['cateid']." AND flag=1 ORDER BY orders ASC";if(intval($childnum)>0){$child_sql.=" LIMIT $childnum";}$child_cate = $GLOBALS['db']->getall($child_sql);foreach($child_cate as $child_key => $child_value){$category[count($category)-1]['childcategory'][] = array('cateid'=>$child_value['cateid'],'catename'=>$child_value['catename']);}}return $category;}PHP页面调用分类，如index.php$goodscatetree = array();$goodscatetree = temp_goodstreecate(4,0); //调用分类函数（含二级分类）4--表示一级分类只显示4个，0--表示二级分类不限数量$tpl>assign("goodscatetree",$goodscatetree); //执行smarty引擎$tpl->display->(index.tpl); //输出smarty模版页面TPL模版页面输出分类，如index.tpl页面{section name=p loop=$goodscatetree}一级分类：{$goodscatetree[p].catename}{section name=c loop=$goodscatetree[p].childcategory}二级分类：{$goodscatetree[p].childcategory[c].catename}{/section}{/section}