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

[zhang-先生]

$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.

[xuzuning]

$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
)

)