How to dynamically unset nested array keys?

Question

Lets suppose I have this array:

$doc = array(
    'nfe' => array(
        'inf' => array(
            'det' => array(
                'emit' => array(
                     'name' => 'My name'
                )
            )
        )
    )
)

and another array with the keys I want to unset (in order):

$keys = ['nfe', 'inf', 'det', 'emit']

How can I dynamically do this:

unset($doc['nfe']['inf']['det']['emit']);

Based on both arrays $doc and $keys ?

Have you tried anything so far?

Nigel Ren
– Nigel Ren

2019-10-01 18:21:54 +00:00
Commented Oct 1, 2019 at 18:21 — Nigel Ren
– Nigel Ren, Commented Oct 1, 2019 at 18:21

AbraCadaver · Accepted Answer · 2019-10-01 19:04:36Z

3

Playing around with some of my code from How to access and manipulate multi-dimensional array by key names / path?:

function unsetter($path, &$array) {
    $temp =& $array;
    $last = array_pop($path);

    foreach($path as $key) {
        $temp =& $temp[$key];
    }
    unset($temp[$last]);
}

Here is an eval method:

function unsetter($path, &$array) {
    $path = "['" . implode("']['", $path) . "']";
    eval("unset(\$array{$path});");
}

edited Oct 1, 2019 at 19:04

answered Oct 1, 2019 at 18:41

AbraCadaver

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1 Comment

Fantasmic Over a year ago

Wow, I would never think of a solution like this. It worked like a charm. Thank you!

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