Dropbox API output images from directory

index.php

<?php

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://api.dropboxapi.com/2/files/list_folder');
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
  'Authorization: Bearer MY_DROPBOX_ACCESS_KEY',
  'Content-Type: application/json',
  'Accept: application/json'
));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode(array('path' => '')));

$result = curl_exec($ch);
curl_close($ch);
unset($ch);

$result_arr = json_decode($result);

foreach($result_arr->entries as $r) {
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, 'https://api.dropboxapi.com/2/sharing/create_shared_link');
  curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Authorization: Bearer MY_DROPBOX_ACCESS_KEY',
    'Content-Type: application/json',
    'Accept: application/json'
  ));
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
  curl_setopt($ch, CURLOPT_POST, 1);
  curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode(array('path' => $r->path_lower)));

  $result = curl_exec($ch);
  curl_close($ch);
  unset($ch);

  $image_data = json_decode($result);
  echo '<img src="'.$image_data->url.'&raw=1" />';
}