更改单个元素数组的键

Question

I have an array tree from a database, I want to change the key of a child element in this case the second array 'eric'=>array into integer '0'=>array as follow :

0 => Array
    ('text' => 'paris',
     'nodes' => Array
            ('eric' => Array
                    (  'text' => 'eric',
                       'nodes' => Array
                           (0 => Array
                               (
                                'text' => 'so.png',              
                               ),
                           ),
                    ),
            ),
   ),

there is my code :

while($d = mysqli_fetch_assoc($result)) {
    if(!isset($data[$d['country']])) {
       $data[$d['country']] = array(
         'text' => $d['country'],
         'nodes' => array()  
       ); 
    }
    if(!isset($data[$d['country']]['nodes'][$d['name']])) {
        $data[$d['country']]['nodes'][$d['name']] = array(
          'text' => $d['name'],
          'nodes' => array()
        );    
     }
    array_push($data[$d['country']]['nodes'][$d['name']]['nodes'], $d['n_doc']);
}

Answer 1

To change all of the child keys to numeric values, you can simply just use array_values()

Live Demo

for($i = 0; $i <= count($data) -1; $i++) { # This loops through each country
    $data[$i]['nodes'] = array_map(function($node) { # This preserves the parent text value
        return array_values($node); # [0] => Paris, [1] => array(...)
    }, $data[$i]['nodes']);
}

Output

[ ... => [ text => Paris, nodes => [ 0 => Paris, 1 => [ ... ] ] ... ] ... ]