Code snippet by Darcy to help me understand dynamic objects in PHP. Props taken from WordPress project (mdupuis)

dynamic-image-object.php

<?php
// PHP 5.4+
// Dynamically generated images objects


// Properties
$props = array('ID', 'caption', 'title', 'alt', 'sizes');

// Make an images object
$images = new stdClass();

// Create three nested images objects with some initial data
$images->large  = (object) array('size' => 'mosaic-large', 'field' => get_sub_field('image_1'));
$images->top    = (object) array('size' => 'mosaic-small', 'field' => get_sub_field('image_2'));
$images->bottom = (object) array('size' => 'mosaic-small', 'field' => get_sub_field('image_3'));

// Iterate over images
foreach($images as $image => $data):

  // Iterate over properties
  foreach($props as $prop):
    $images->{$image}->{$prop} = $data->field[$prop];
  endforeach;

  // Add image data
  $images->{$image}->url     = $data->field['sizes'][$data->size];
  $images->{$image}->width   = $data->field['sizes'][$data->size.'-width'];
  $images->{$image}->height  = $data->field['sizes'][$data->size.'-height'];

  // Get rid of redundant image field data
  unset($images->{$image}->field);

endforeach;

// Now you should have a nice $images object with all your info
print_r($images);