$area = array(array(‘id‘=>1,‘name‘=>‘安徽‘,‘parent‘=>0),array(‘id‘=>2,‘name‘=>‘海淀‘,‘parent‘=>7),array(‘id‘=>3,‘name‘=>‘濉溪县‘,‘parent‘=>5),array(‘id‘=>4,‘name‘=>‘昌平‘,‘parent‘=>7),array(‘id‘=>5,‘name‘=>‘淮北‘,‘parent‘=>1),array(‘id‘=>6,‘name‘=>‘朝阳‘,‘parent‘=>7),array(‘id‘=>7,‘name‘=>‘北京‘,‘parent‘=>0),array(‘id‘=>8,‘name‘=>‘上地‘,‘parent‘=>2));function gettree($arr,$id){	$tree  = array();	while($id !=0){	foreach($arr as $v){			if($v[‘id‘] == $id){				$tree[] = $v;       //把找到的子数组放进空的tree数组里				$id = $v[‘parent‘];  //while循环时用到的。				break;			}	    }	}	return $tree;}print_r(gettree($area,8));