PHP Get array of a property from array of objects [duplicate]

Question

I have an API that sends me the data in the format

[{"part_no":"AAA"},{"part_no":"BBB"},{"part_no":"CCC"},......{"part_no":"ZZZ"}]

I want to create an array like ["AAA", "BBB", ...., "ZZZ"] from the above array.

I know it's possible by iterating the array item by item, and appending it to a new array, but thought that there might be a better (and hopefully faster) approach.

Like C# hasLinq that does this all in a one-liner, JS has map, it is possible to do a similar thing in PHP ?

$out = array_map(fn($item) => $item['part_no'], $in); or, if it's a simple associative array: $out = array_column($in, 'part_no'); — Yoshi
– Yoshi, Commented Sep 30, 2020 at 8:44
Prior to PHP7.4: $out = array_map(function ($part) { return $part['part_no']; }, json_decode($data, true)); — Nick
– Nick, Commented Sep 30, 2020 at 8:47
and hopefully faster Of course there are one liners in PHP, but it is not faster than looping. — mighty_dev
– mighty_dev, Commented Sep 30, 2020 at 8:52

Progrock · Accepted Answer · 2020-09-30 08:50:24Z

0

<?php

$json = '[{"part_no":"AAA"},{"part_no":"BBB"},{"part_no":"CCC"},{"part_no":"ZZZ"}]';
$data = json_decode($json, true);

$result = array_column($data, 'part_no');
var_export($result);

Output:

array (
    0 => 'AAA',
    1 => 'BBB',
    2 => 'CCC',
    3 => 'ZZZ',
  )

answered Sep 30, 2020 at 8:50

Progrock

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