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@ 2013-04-01T13:32:23Z

<?php
$records = array(
    array(
        'id' => 2135,
        'first_name' => 'John',
        'last_name' => 'Doe'
    ),
    array(
        'id' => -1,
        'first_name' => 'Sally',
        'last_name' => 'Smith'
    ),
    array(
        'id' => -2,
        'first_name' => 'Jane',
        'last_name' => 'Jones'
    ),
);
 
$firstNames = array_column($records, 'first_name', 'id');
print_r($firstNames);

Output
Performance
VLD
References
Branches

array_column: documentation ( source)
print_r: documentation ( source)

preferences:dark modelive previewkey bindings

25.32 ms | 405 KiB | 5 Q