how to simplify an array of arrays with single object attribute [duplicate]

Question

I have the following data structure:

$campaigns =
Array
(
[0] => Array
    (
        [subject] => cca-cpg
    )

[1] => Array
    (
        [subject] => cleanup-cpg
    )

[2] => Array
    (
        [subject] => gas-cpg
    )

[3] => Array
    (
        [subject] => pollinators-cpg
    )

)

what I would like to end up with is:

$campaigns = ['cca-cpg','clean_up-cpg','gas-cpg','pollinators-cpg'];


this will work:
$newCampaigns=[];
for($i=0;$i<count($campaigns);$i++){
   array_push($newCampaigns,$campaigns[$i]['subject'];
}

but I was wondering if there's a better way to do this. The data is coming directly from a mysql database

Robo Robok · Accepted Answer · 2020-05-30 21:35:25Z

2

There's array_column() function for you:

$newCampaigns = array_column($campaigns, 'subject');

Source: https://www.php.net/manual/en/function.array-column.php

answered May 30, 2020 at 21:35

Robo Robok

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