<?phpheader("Content-Type:text/html;charset=utf-8");$aarr=array(array('id'=>1,'name'=>'安徽','pid'=>0),array('id'=>2,'name'=>'海淀','pid'=>7),array('id'=>3,'name'=>'浣溪县','pid'=>5),array('id'=>4,'name'=>'昌平','pid'=>7),array('id'=>5,'name'=>'淮北','pid'=>1),array('id'=>6,'name'=>'朝阳','pid'=>7),array('id'=>7,'name'=>'北京','pid'=>0),array('id'=>8,'name'=>'上地','pid'=>2));//家谱树的应用，如面包屑导航，首页>手机类型>GSM手机>iPhone>iPhone6sfunctionfamilytree($arr,$id){$tree=array();foreach($arras$v){if($v['id']==$id){$tree[]=$v;if($v['pid']>0){array_push($tree,familytree($arr,$v['pid']));}}}return$tree;}echo"<pre>";print_r(familytree($aarr,8));