Printing parts of an array in PHP - php

Question

please excuse if this question is already answered elsewhere, but I just don't know what to search for, since I usually don't work with php.
I've got the following array:
(
[0] => Array
(
[login] => name23
[id] => 12356
)
[1] => Array
(
[login] => name12
[id] => 12345
)
[2] => Array
(
[login] => name34
[id] => 12367
)
)
And I'd like to only print the login-names, so in this example name23, name12, name34 (But I never know how many there are).
I've tried several approaches with foreach, which didn't work.
What is working, but only for one username is this:
echo $contributors[0]['login'];
How can I display all login-names?
Any help would be much appreciated.
Thanks in advance!

Answer 1

array_map is a universal function for tasks like this, in your case, this code would work:
$array = [['login' => "name23", 'id' => 12356], ['login' => "name12", 'id' => 12345], ['login' => "name34", 'id' => 12367]];
print_r(array_map(function($data) { return $data['login']; }, $array));
Manual: https://www.php.net/array-map
But for your specific task, array_column is simpler, as recommended by Aghilan B.
There is also array_walk function that can be used like this:
$array = [['login' => "name23", 'id' => 12356], ['login' => "name12", 'id' => 12345], ['login' => "name34", 'id' => 12367]];
array_walk($array, function($data) { print $data['login'] . "\n"; });
That can be useful if you want to do more with the logins than just printing it, it would not need to iterate twice.

Answer 2

You can use array_column() Function
$array = [['login' => "name23", 'id' => 12356], ['login' => "name12", 'id' => 12345], ['login' => "name34", 'id' => 12367]];
$login_array = array_column($array, 'login');
print_r($login_array);
Output
Array
(
[0] => "name23"
[1] => "name12"
[2] => "name34"
)
Use implode(', ', $login_array); to print as a string with commas