How can I sort an array in PHP alphabetically? [duplicate]

This question already has answers here: Closed 11 years ago.

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How to sort a multi dimensional array in PHP alphabet开发者_如何学运维ically?

PHP : Sort array alphabetically

I am developing an API using Codeigniter and Phils RESTserver. In this API I access a database that contains users.

I would like to sort these users before outputting them. How can I do this? I tried the below code but that does not work.

function sort_by_lastname($a, $b)
{
    return strcmp($a['user']['basic']['lastname'], $a['user']['basic']['lastname']);
}

This is my data in JSON format.

http://pastie.org/2402372

How can I alter the above to sort this output (when in PHP array format, not JSON).

Thankful for all help!

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function sort_by_lastname($a, $b) {
    $a = trim($a['user']['basic'][0]['lastname']);
    $b = trim($b['user']['basic'][0]['lastname']);

    if ($a == $b) {
        return 0;
    }

    return ($a < $b) ? -1 : 1;
}

uasort($array['contacts'],'sort_by_lastname');

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Check out php array_multisort

http://php.net/manual/en/function.array-multisort.php

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Check PHP.net before asking here. A quick search would have turned up PHP's asort() function: http://php.net/asort