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@ 2013-12-23T15:16:17Z

<?php

$names = array(
    array('id' => 123, 'name' => 'A'),
    array('id' => 456, 'name' => 'B'),
    array('id' => 789, 'name' => 'C'),
);

$ids = array_map(function ($name) {
    return $name['id'];
}, $names);

var_dump($ids);

Output
Performance
VLD
References
Branches

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

preferences:dark modelive preview

33.93 ms | 402 KiB | 5 Q