地区分类排序算法

$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
;
    }