php二维数组排序

Question

$ary=array(array("ID"=>13,"name"=>"kitty"),array("ID"=>22,"name"=>"sony"),array("ID"=>17,"name"=>"picker"));
我想对其按照ID升序调整一维数组的顺序，结果为
array(array("ID"=>13,"name"=>"kitty"),array("ID"=>17,"name"=>"picker")，array("ID"=>22,"name"=>"sony"));
应该怎么写？

Answer 1

<?php
$ary=array(array("ID"=>13,"name"=>"kitty"),array("ID"=>22,"name"=>"sony"),array("ID"=>17,"name"=>"picker"));
foreach ($ary as $v)
$sort[]=$v['ID'];
array_multisort($sort,$ary);
print_r($ary);

Answer 2

本帖最后由 PhpNewnew 于 2012-04-26 17:37:58 编辑

  

Answer 3

function foo($a,$b)
{
    return ($a[ID] < $b[ID]) ? -1 : 1;
}
usort($ary,'foo');
print_r($ary);