如何取消设置对象数组中所有对象的键？

Question

I'm trying to unset a key in all objects in an array of objects (basically removing any passwords), doing this:

    foreach ( $data['users'] as $user) {
        unset($user['password']);
    }

But it seems it doesn't effect the 'original' data ... how do I do this by reference (or whatever it takes to make this work as 'expected' – by which I mean, the key is removed from all objects in the original array)?

Answer 1

Try:

foreach ( $data['users'] as $key => $user) {
    unset($data['users'][$key]['password']);
}

Or

foreach ( $data['users'] as &$user) {
    unset($user['password']);
}

Answer 2

You can pass the $user as reference like this :

// check this --------------v
foreach ( $data['users'] as &$user) {
    unset($user['password']);
}

Answer 3

我的建议：

array_walk($data['users'], function(&$a) {unset($a['password']);});