php 二维数组排序

<?php
users = array(
            array(
                'name' => 'tom',
                'age' => 20
            ),
            array(
                'name' => 'anny',
                'age' => 18
            ),
            array(
                'name' => 'jack',
                'age' => 22
            )
        );
        array_multisort($users, SORT_ASC, array_column($users, 'age'));
        var_dump($users);