$array = array(    0=>array("","河北"),    1=>array("","北京"),    2=>array(0,"保定"),    3=>array(1,"海淀"),    4=>array(3,"中关村"),    5=>array(2,"涿州"));

function typeArray($array){ $con = null; foreach ($array as $k=>$v){ $na[$k] = is_numeric($v[0]) ? $na[$v[0]].$k."|" : $k."|";        } asort($na); //排序 foreach ($na as $k=>$v){ $s = substr_count($v,"|"); $con .= str_repeat("-",($s-1)).$array[$k][1]."\n";        } return $con;    }