如何将这部分数组复制到php中的新数组？

Question

I have this php array X.

X= array(
    'Parent' => array(
        'title' => '123',
    )
)

I have this php array Y.

Y = array(
    'Parent' => array(
        'id' => '16',
        'title' => 'T1',
    ),
    'Children' => array(
        (int) 0 => array(
            'id' => '8',
            'serial_no' => '1',
        ),
        (int) 1 => array(
            'id' => '9',
            'serial_no' => '2',
        ),
        (int) 2 => array(
            'id' => '14',
            'serial_no' => '6',
        )
    )
)

I want to copy the Children of array Y to the parent of array X to form array Z such that it looks like this;

Z= array(
        'Parent' => array(
            'title' => '123',
        )
        'Children' => array(
            (int) 0 => array(                   
                'serial_no' => '1'
            ),
            (int) 1 => array(
                'serial_no' => '2'
            ),
            (int) 2 => array(
                'serial_no' => '6'
            )
        )
    )

Please note that the id key-value pair was removed from the Children of array Y.

I wrote some code of my own.

            $Z = array();
            $i=0;
            foreach($Y as $temp) 
            {
                $Z['Children'][$i] = $temp['Children'][$i];     
                unset($Z['Children'][$i]['id'];
                $i++;
            }    
            $Z['Parent']=$temp['Parent'];

Unfortunately, there is an undefined index error. How can this be done in php? Forget about my code if there are better approaches.

Answer 1

Actually your approach works too, but you need to iterate over sub-array:

$Z = array();
$i=0;
foreach($Y['Children'] as $temp) 
{
    $Z['Children'][$i] = $temp;     
    unset($Z['Children'][$i]['id'];
    $i++;
}

or what I may do:

$Z = $X;
$Z['Children'] = array();
foreach ( $Y['Children'] as $child ) {
    $Z['Children'][] = array(
        'serial_no' => $child['serial_no'],
    );
}