php 多维数组排序问题 把数组test_data按id_arr顺序重新排序.

Question

$test_data = array(
            array("id"=>1,"data"=>"a"),
            array("id"=>3,"data"=>"c"),
            array("id"=>2,"data"=>"b"),
            array("id"=>4,"data"=>"d"),
            array("id"=>6,"data"=>"f"),
            array("id"=>5,"data"=>"e")
        );


$id_arr = array (2,1,3,4,5,6);array_multisort不太会用,向大侠请教.

Answer 1

$test_data = array(
  array("id"=>1,"data"=>"a"),
  array("id"=>3,"data"=>"c"),
  array("id"=>2,"data"=>"b"),
  array("id"=>4,"data"=>"d"),
  array("id"=>6,"data"=>"f"),
  array("id"=>5,"data"=>"e")
  );
$id_arr = array (2,1,3,4,5,6);foreach($test_data as $v)
  $r[] = array_search($v['id'], $id_arr);array_multisort($r, $test_data);print_r($test_data);Array
(
    [0] => Array
        (
            [id] => 2
            [data] => b
        )    [1] => Array
        (
            [id] => 1
            [data] => a
        )    [2] => Array
        (
            [id] => 3
            [data] => c
        )    [3] => Array
        (
            [id] => 4
            [data] => d
        )    [4] => Array
        (
            [id] => 5
            [data] => e
        )    [5] => Array
        (
            [id] => 6
            [data] => f
        ))