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@ 2014-04-07T13:48:16Z

<?php
$a = [
	[
		'id' => 123,
    ],
    [
		'id' => 124,
    ],
    [
		'id' => 125,
    ]
];
$b = array_map(function($item) {
    return $item['id'];
}, $a);
var_dump();

Output
Performance
VLD
References
Branches

array_map: documentation ( source)
var_dump: documentation ( source)

preferences:dark modelive preview

33.3 ms | 405 KiB | 6 Q