合并并重新排列嵌套的键/值

Question

I have an array like this:

array(
  0 => array(
    'name' => 'colors',
    'options' => array(
      array('name'=>'red', 'price'=>'2'),
      array('name'=>'blue', 'price'=>'3')
    )
  ),
  1 => array(
    'name' => 'sizes',
    'options' => array(
      array('name'=>'small', 'price'=>'5'),
      array('name'=>'large', 'price'=>'10')
    )
  ),
);

I want to merge all of the nested options arrays' name/prices into one, so it'll be like this:

array(
  'red' => '2',
  'blue' => '3',
  'small' => '5',
  'large' => '10'
);

I have a feeling this is very simple, but anything I try seems too convoluted. Any help would be appreciated.

...and yes, I just posted almost the same question not too long ago. This is a bit different, and what I meant to ask in the first place - oops, sorry.

Answer 1

I'm not sure if this can be done with internal methods such as array_merge(), array_combine(), etc since your structure seems quite special. But how about iterating over the array and building a new one yourself?

function customRearrange($arr) {
    $result = array();
    foreach ($arr as $group) {
        foreach ($group['options'] as $option) {
            // prevents values from being overwritten, uncomment if unwanted
            if (!array_key_exists($option['name'], $result))
                $result[ $option['name'] ] = $option['price'];
        }
    }
    return $result;
}