Question

I have an array that looks something like this:

array(
  (int) 0 => array(
    'SomeItem' => array(
        'id' => '1',
        'number' => '3',
        'created' => '2012-07-20 23:34:00',
        'modified' => '2012-07-20 23:34:00'
      )
  )
  (int) 1 => array(
    'SomeItem' => array(
        'id' => '1',
        'number' => '6',
        'created' => '2012-07-20 23:34:00',
        'modified' => '2012-07-20 23:34:00'
    )
  )
)

How would I sort it by “number” so I could put it in ascending order of number, while still maintaining the structure?

Thank you!

Answer 1

Using Closure:

usort($array, function($a, $b)
        {
            if ($a['SomeItem']['number'] == $b['SomeItem']['number'])
                return 0;

            return ($a['SomeItem']['number'] < $b['SomeItem']['number']) ? -1 : 1;
        }
    );  

Without

function cmp($a, $b)
{
    if ($a['SomeItem']['number'] == $b['SomeItem']['number'])
        return 0;

    return ($a['SomeItem']['number'] < $b['SomeItem']['number']) ? -1 : 1;
}
usort($array, 'cmp');