PHP项目中用到无限极导航，面包屑最精简递归输出

<?php /** * * 递归输出网页常用的无限极分类相关项目。树形下拉，面包屑导航，获取传递栏目下子栏目 * @author www.16186.com * */ class Category{ //无限极分类树 public function cateTree($cate,$pid = 0,$level = 0){ $cateTree = array(); foreach($cate as $v){ if($v['pid'] == $pid){ $v['html'] = str_repeat("&nbsp;&nbsp;--",$level); $cateTree[] = $v; $cateTree = array_merge($cateTree,self::cateTree($cate,$v['cid'],$level+1)); } } return $cateTree; } //生成多维子栏目数组 public function cateArray($cate,$pid = 0){ $cateArray = array(); foreach($cate as $v){ if($v['pid'] == $pid){ $v['child'] = self::cateArray($cate,$v['cid']); $cateArray[] = $v; } } return $cateArray; } //传递一个父级栏目ID返回该栏目下所有子栏目 public function cateChilds($cate,$cid){ $cateChilds = array(); foreach($cate as $v){ if($v['pid'] == $cid){ $cateChilds[] = $v; $cateChilds = array_merge($cateChilds,self::cateChilds($cate, $v['cid'])); } } return $cateChilds; } //传递一个父级栏目ID返回该栏目下所有子栏目id public function cids($cate,$cid){ $cids = array(); foreach($cate as $v){ if($v['pid'] == $cid){ $cids[] = $v['cid']; $cids = array_merge($cids,self::$cids($cate, $v['cid'])); } } return $cateChilds; } //传递一个子分类ID，返回改栏目所有父级栏目 public function cateParents($cate,$cid){ $cateParents = array(); foreach($cate as $v){ if($v['cid'] == $cid){ $cateParents[] = $v; $cateParents = array_merge(self::cateParents($cate, $v['pid']),$cateParents); } } return $cateParents; } }