Multi-dimensional array sorting

I have an array {code...}. now I want to sort the {code...} in ascending order of id. what should I do? It is best to borrow built-in functions. I have an array

[    ["id"=>3],    ["id"=>1],     ["id"=>2]]

Sort IDs in ascending order.

[    ["id"=>1],    ["id"=>2],     ["id"=>3]]

What should I do? It is best to borrow built-in functions.

Reply content:

I have an array

[    ["id"=>3],    ["id"=>1],     ["id"=>2]]

Sort IDs in ascending order.

[    ["id"=>1],    ["id"=>2],     ["id"=>3]]

What should I do? It is best to borrow built-in functions.

Http://php.net/manual/en/function.usort.php

usort($arr, 'cmp');function cmp($a, $b){    if ($a['id'] == $b['id']) {        return 0;    }    return ($a['id'] < $b['id']) ? -1 : 1;}

If we can determine that all values are int type

usort($arr, 'cmp');function cmp($a, $b){    return $a['id'] - $b['id'];}

$ Data = current array; foreach ($ data as $ d) {$ arr [$ data ['id'] = $ d;} print_r ($ arr );

You see, write a function, general, http://blog.csdn.net/igo9go_zq/article/details/48138405