CODEWITHSUNDEEP
phparrays
Nicholas Summers
Nicholas Summers

Reputation: 4756

Simple way to get only non-numeric keys from an array

So I have a PHP array like so:

Array
(
    [0] => Array
        (
            [offset] => 1
            [0] => 1
            [name] => Value:990937970
            [1] => Value:990937970
        )

    [1] => Array
        (
            [offset] => 2
            [0] => 2
            [name] => Value:482758260
            [1] => Value:482758260
        )

    [2] => Array
        (
            [offset] => 3
            [0] => 3
            [name] => Value:2045053536
            [1] => Value:2045053536
        )

)

But I want to change it so that the numeric keys are not returned, like this:

Array
(
    [0] => Array
        (
            [offset] => 1
            [name] => Value:990937970
        )

    [1] => Array
        (
            [offset] => 2
            [name] => Value:482758260
        )

    [2] => Array
        (
            [offset] => 3
            [name] => Value:2045053536
        )

)

My Question: Is there a simple way (without a foreach or while loop) to strip out these numeric keys?

I know that I can just do a foreach where I check if $key is a string; however, loops add to my code's cyclomatic complexity so I am trying to avoid them.

Upvotes: 2

Views: 2439

Answers (2)

warly
warly

Reputation: 1630

It's an old question, but this may be what you are looking for. You filter over the array given the key and remove any which value which key is numeric:

array_filter($input, fn($key) => !is_numeric($key), ARRAY_FILTER_USE_KEY);

Upvotes: 0

Amal Murali
Amal Murali

Reputation: 76636

Well, if you really don't want to use a foreach, you can do:

array_walk($data, function (&$v) {
    $keys = array_filter(array_keys($v), function($k) {return !is_int($k);});
    $v = array_intersect_key($v, array_flip($keys));
});

array_walk() still does the looping just as a foreach would; it just isn't explicitly shown.

Also, as mario said, modifying the database query would be a much recommended course of action than this. If you must do this on the PHP side, a foreach would be lot more efficient.

Demo

Upvotes: 2

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