How to get the values of a multi-dimensional array by key in Laravel?

Question

Let's say for example you have a constant multi-dimensional array with multiple keys (and values), but you want to filter out specific keys with it's values. See a example array below:

const defaultInvestmentFields = [
     [
         'type' => 'system',
         'investment_name' => 'Ballast'
     ],
     [
         'type' => 'system',
         'investment_name' => 'Inverters'
     ],
        [
         'type' => 'system',
         'investment_name' => 'Extra garantie inverters'
     ]
];

The output I want is an array with only the values of investment_name. Like ['Ballast', 'Inverters', 'Extra garantie inverters'].

array_column is function name.

Tpojka
– Tpojka

2021-08-05 11:01:24 +00:00
Commented Aug 5, 2021 at 11:01 — Tpojka
– Tpojka, Commented Aug 5, 2021 at 11:01

shaedrich · Accepted Answer · 2021-08-05 09:51:07Z

3

Additionally to @Levi's answer, you can use an array helper to avoid having to transform the array into a collection and back: Arr::pluck()

Arr::pluck(Project::defaultInvestmentFields, 'investment_name');

edited Aug 5, 2021 at 9:51

answered Aug 5, 2021 at 9:14

shaedrich

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2 Comments

Levi Roelofsma Over a year ago

Thanks for your answer! It's way faster, but transforming it to a collection will give more flexibility.

shaedrich Over a year ago

You're welcome. Sure, flexibility where flexibility is due.

Levi Roelofsma · Accepted Answer · 2021-08-05 09:08:17Z

1

A quick and neat solution would be to use the collect wrapper function which is provided by Laravel. After that we can use the pluck function in order to specify which values by their key(s) we want to get. For example:

collect(Project::defaultInvestmentFields)->pluck('investment_name');

Now we have a Collection of the following values: Ballast, Inverters and Extra garantie inverters. In order to use it as an array, simply call toArray() on it.

answered Aug 5, 2021 at 9:08

Levi Roelofsma

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