Rebuild array to add keys from a second array

Question

How can I use Array1 and Array2 to get the Wanted Result?

Array1

array(
    (int) 0 => '37',
    (int) 1 => '38'
)

Array2

array(
    (int) 0 => array(
        'ParentKey' => array(
            'ChildKey1' => '1',
            'ChildKey2' => '2'
        )
    ),
    (int) 1 => array(
        'ParentKey' => array(
            'ChildKey1' => '1',
            'ChildKey2' => '1'
        )
    )
)

Wanted Result

array(
    (int) 0 => array(
        'ParentKey' => array(
            'Array1Key' => 37,
            'ChildKey1' => '1',
            'ChildKey2' => '2'
        )
    ),
    (int) 1 => array(
        'ParentKey' => array(
            'Array1Key' => 37,
            'ChildKey1' => '1',
            'ChildKey2' => '1'
        )
    )
    (int) 2 => array(
        'ParentKey' => array(
            'Array1Key' => 38,
            'ChildKey1' => '1',
            'ChildKey2' => '2'
        )
    ),
    (int) 3 => array(
        'ParentKey' => array(
            'Array1Key' => 38,
            'ChildKey1' => '1',
            'ChildKey2' => '1'
        )
    )
)

I have tried several things but this got me the closest...

PHP

$data = array();
foreach($Array1 as $id)
{
    foreach($Array2 as $Array1Result)
    {
        $data[]['ParentKey'] = array(
            'Array1Key' => $id,
            $Array1Result['ParentKey']
        );
    }
}

Result

array(
  (int) 0 => array(
    'ParentKey' => array(
        'Array1Key' => '37',
        (int) 0 => array(
            'ChildKey1' => '1',
            'ChildKey2' => '2'
        )
    )
  ),
  (int) 1 => array(
    'ParentKey' => array(
        'Array1Key' => '37',
        (int) 0 => array(
            'ChildKey1' => '1',
            'ChildKey2' => '1'
        )
    )
  ),
  (int) 2 => array(
    'ParentKey' => array(
        'Array1Key' => '38',
        (int) 0 => array(
            'ChildKey1' => '1',
            'ChildKey2' => '2'
        )
    )
  ),
  (int) 3 => array(
    'ParentKey' => array(
        'Array1Key' => '38',
        (int) 0 => array(
            'ChildKey1' => '1',
            'ChildKey2' => '1'
        )
    )
  )
)

Replace array('Array1Key' => $id, $Array1Result['ParentKey']) with array_merge(array('Array1Key' => $id), $Array1Result['ParentKey']) — Charlotte Dunois
– Charlotte Dunois, Commented Nov 1, 2016 at 18:52
@CharlotteDunois That pretty much did it. Thanks! I just had to take out the array() after $data[]['ParentKey'] = — Draven
– Draven, Commented Nov 1, 2016 at 18:57

Charlotte Dunois · Accepted Answer · 2016-11-01 19:28:32Z

2

What you get is exactly what you do. You put an array inside an array. But you need to merge two arrays together. The first one being the Array1Key and the second one the old array. You can achieve this with array_merge.

$data = array();
foreach($Array1 as $id)
{
    foreach($Array2 as $Array1Result)
    {
        $data[]['ParentKey'] = array_merge(
            array('Array1Key' => $id),
            $Array1Result['ParentKey']
        );
    }
}

answered Nov 1, 2016 at 19:28

Charlotte Dunois

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