遍历嵌套数组并转换一些值

Question

I'm looking for a clean solution to transform a nested array.

Here is what I'm trying to achieve...

Original array:

  $map = array(
    'name' => 'super test',
    'machine_name' => 'super_test',
    'class' => 'openlayers_map_map',
    'options' => array(
      'width' => 'auto',
      'height' => '300px',
      'contextualLinks' => 1,
      'provideBlock' => 1,
      'view' => array(
        'center' => array(
          'lat' => '0',
          'lon' => '0',
        ),
        'rotation' => '0',
        'zoom' => '2',
      ),
      'layers' => array(
        '0' => array(
          'name' => 'Ma super layer',
          'machine_name' => 'plouf',
          'class' => 'openlayers_layer_tile',
          'options' => array(
            'source' => array(
              'name' => 'Ma super layer',
              'machine_name' => 'plouf',
              'class' => 'openlayers_source_osm'
            ),
            'param1' => 'ca roule'
          )
        ),
      ),
      'controls' => array(
        'control_mouseposition',
        '0' => array(
          'name' => 'Control attribution',
          'machine_name' => 'openlayers_control_attribution',
          'class' => 'openlayers_control_attribution',
          'options' => array(
            'collapsible' => 1
          )
        ),
        'control_rotate',
        'control_zoom',
      ),
      'interactions' => array(
        'interaction_doubleclickzoom',
        'interaction_dragpan',
        'interaction_dragrotateandzoom',
        'interaction_mousewheelzoom',
      ),
    )
  );

Final array:

  $map = array(
    'name' => 'super test',
    'machine_name' => 'super_test',
    'class' => 'openlayers_map_map',
    'options' => array(
      'width' => 'auto',
      'height' => '300px',
      'contextualLinks' => 1,
      'provideBlock' => 1,
      'view' => array(
        'center' => array(
          'lat' => '0',
          'lon' => '0',
        ),
        'rotation' => '0',
        'zoom' => '2',
      ),
      'layers' => array(
        '0' => (object) openlayers_layer_tile
          'name' => 'Ma super layer',
          'machine_name' => 'plouf',
          'class' => 'openlayers_layer_tile',
          'options' => array(
            'source' => (object) openlayers_source_osm
              'name' => 'Ma super layer',
              'machine_name' => 'plouf',
              'class' => 'openlayers_source_osm'
            ),
            'param1' => 'ca roule'
          )
        ),
      ),
      'controls' => array(
        'control_mouseposition',
        '0' => (object) openlayers_control_attribution
          'name' => 'Control attribution',
          'machine_name' => 'openlayers_control_attribution',
          'class' => 'openlayers_control_attribution',
          'options' => array(
            'collapsible' => 1
          )
        ),
        'control_rotate',
        'control_zoom',
      ),
      'interactions' => array(
        'interaction_doubleclickzoom',
        'interaction_dragpan',
        'interaction_dragrotateandzoom',
        'interaction_mousewheelzoom',
      ),
    )
  );

Basically, I need to traverse the array, find all children with the 'class' key and transform them into objects of the same name.

Answer 1

If you don't have the classes ready to be instantiated, this code will create anonymous objects instead. (The class name still being present as a property.)

function class_to_object (&$arr) {

  if (is_array($arr)) {
    foreach ($arr as $key => &$val) {
      class_to_object($val);
    }

    if (isset($arr['class'])) {
      $arr = (object) $arr;
    }
  }

}

class_to_object($map);

Result :

(Notice that the first array is turned into an object, since it contains the field "class" too. I guess you can tweak the function easily enough if you don't want that behavior)

stdClass Object
(
    [name] => super test
    [machine_name] => super_test
    [class] => openlayers_map_map
    [options] => Array
        (
            [width] => auto
            [height] => 300px
            [contextualLinks] => 1
            [provideBlock] => 1
            [view] => Array
                (
                    [center] => Array
                        (
                            [lat] => 0
                            [lon] => 0
                        )

                    [rotation] => 0
                    [zoom] => 2
                )

            [layers] => Array
                (
                    [0] => stdClass Object
                        (
                            [name] => Ma super layer
                            [machine_name] => plouf
                            [class] => openlayers_layer_tile
                            [options] => Array
                                (
                                    [source] => stdClass Object
                                        (
                                            [name] => Ma super layer
                                            [machine_name] => plouf
                                            [class] => openlayers_source_osm
                                        )

                                    [param1] => ca roule
                                )

                        )

                )

            [controls] => Array
                (
                    [0] => stdClass Object
                        (
                            [name] => Control attribution
                            [machine_name] => openlayers_control_attribution
                            [class] => openlayers_control_attribution
                            [options] => Array
                                (
                                    [collapsible] => 1
                                )

                        )

                    [1] => control_rotate
                    [2] => control_zoom
                )

            [interactions] => Array
                (
                    [0] => interaction_doubleclickzoom
                    [1] => interaction_dragpan
                    [2] => interaction_dragrotateandzoom
                    [3] => interaction_mousewheelzoom
                )

        )

)