Very nice.. thank you!

MMoy,

Appreciate you putting this out there, and I think MANY folks could us this. I've not gotten it to work yet, but if I could, it would be a solution I could use.

I am trying to show a random thumbnail in a side 'block' of a webpage. It is actually a Tinyportal block on a SMF forum. Shold be pretty strait forwad, but for some reaon I am getting no display....Any assistance appreciated, maye the simple answer is the script does not work with 2.7.4?

Piwigo version:  2.7.4
PHP version: 5.3.29
MySQL version: 5.5.45-MariaDB
Piwigo URL: http://true-grit.org/piwigo


Here is the 'block' code I used:

<span id="random_image">
  <script type="text/javascript"
      src="//http://www.true-grit.net/piwigo-random-backend.php"
      async>
  </script>
</span>

The php file being in my root. Tried permissions a few different ways to no avail....And here is the edited PHP, maybe I missed something?

<?php // -*- mode:php c-basic-offset: 2 -*-
// +-----------------------------------------------------------------------+
// | Piwigo RANDOM - Insert images from a Piwigo Galery in a website       |
// +-----------------------------------------------------------------------+
// | Copyright(C) 2014 Matthieu Moy                                        |
// +-----------------------------------------------------------------------+
// | This program is free software; you can redistribute it and/or modify  |
// | it under the terms of the GNU General Public License as published by  |
// | the Free Software Foundation; either version 2 of the License, or     |
// | (at your option) any later version.                                   |
// |                                                                       |
// | This program is distributed in the hope that it will be useful, but   |
// | WITHOUT ANY WARRANTY; without even the implied warranty of            |
// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      |
// | General Public License for more details.                              |
// |                                                                       |
// | You should have received a copy of the GNU General Public License     |
// | along with this program; if not, write to the Free Software           |
// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
// | USA.                                                                  |
// +-----------------------------------------------------------------------+
// Your piwigo gallery here:
$site = "http://www.true-grit.org/piwigo/";
$maximages = 1;
$cat_id = null;
$element_name = 'random_image';
$mode = 'javascript';
$target = '_blank';
if (is_numeric($_GET['maximages']))
{
  $maximages = intval($_GET['maximages']);
}
if (is_numeric($_GET['cat_id']))
{
  $cat_id = intval($_GET['cat_id']);
}
if (isset($_GET['element_name']))
{
  $element_name = $_GET['element_name'];
}
if (isset($_GET['target']))
{
  $element_name = $_GET['target'];
}
if (isset($_GET['mode']) && $_GET['mode'] == 'html') {
  $mode = 'html';
}
header('Content-Type: text/javascript');
$url = $site . "ws.php" .
  "?format=php" .
  "&method=pwg.categories.getImages" .
  ($cat_id ? "&cat_id=" . $cat_id : "") .
  "&recursive=true" .
  "&per_page=" . $maximages .
  "&page=1" .
  "&order=random";
$response = file_get_contents($url);
$thumbc = unserialize($response);
if ($thumbc["stat"] === 'ok')
{
  foreach ($thumbc["result"]["images"] as $image)
  {
    $image_url = (string)$image['derivatives']['thumb']['url'];
    $page_url = (string)$image['page_url'];
    $comment = (string)$image['comment'];
    if ($comment === '') {
      $comment = "Random image";
    }
    $comment .= "\n(click for full-size)";
    if ($mode === 'javascript') {
      // Would be a bit simpler with jquery, but let's not
      // force it for such a simple piece of code.
      ?>
      var newImg = document.createElement("img");
      newImg.src = <?php echo json_encode($image_url); ?>;
      newImg.alt = "";
      newImg.title = <?php echo json_encode($comment) ?>;
      var newLink = document.createElement("a");
      newLink.href = <?php echo json_encode($page_url); ?>;
      newLink.id = "rndpic-a";
      newLink.appendChild(newImg);
      newLink.target = <?php echo json_encode($target); ?>;
      var target = document.getElementById(<?php echo json_encode($element_name); ?>);
      if (!target)
      {
        // Could not find #random_image. As a
        // fall-back, try to find the parent of the
        // <script> tag calling us.
        // http://stackoverflow.com/questions/6932 … ipt-tag-is
        var target = document.documentElement;
        while (target.childNodes.length && target.lastChild.nodeType == 1)
        {
          target = target.lastChild;
        }
        target = target.parentNode;
      }
      target.appendChild(newLink);
      <?php
    } else if ($mode === 'html') {
      echo '<a id="rndpic-a" href="' . htmlspecialchars($page_url) . '"><img src="'
        . htmlspecialchars($image_url) . '" alt="" title="' . htmlspecialchars($comment) . '" />'
        . '</a>';
    }
  }
}
else
{
  // Silent error.
  // echo "Error";
}

Indeed, it does work if you fix the URL. See: http://www-verimag.imag.fr/~moy/tmp/test-pr.html

> So it was the type of block....In the portal I have to choose , HTML code/Java, RSS, PHP, etc.....I was choosing PHP not thinking.....

There's also a mode where you can do the random picture stuff server-side in PHP (https://github.com/moy/piwigo-random#al … javascript), but the recommanded way does not need PHP at all, it's plain HTML.

> Is there a way adjust the size of the thumbnail a bit?

I've just pushed a version with a "size" parameter. There was no such thing until now.

> Do I change the php file

The only modification you need to do on piwigo-random-backend.php is to set your gallery's URL, which you already did.

> add the ?size=small to the script?

Yes, just like you did.

See also the examples (I've added some with size=... yesterday):

http://www-verimag.imag.fr/~moy/piwigo- … -demo.html

(see the source code, and adapt to your needs)

> src="http://www.true-grit.net/piwigo-random-backend.php?size=small"

Actually, I would recommend removing http: and keep only src="//www.true-grit.net/piwigo-random-backend.php?size=small". This way, if your page is accessed through HTTPS, the script is also downloaded through HTTPS (browsers do not like loading plain HTTP scripts from an HTTPS webpage).

Hi, does this still work with ver. 2.9?

I have changed website address at line 515 of piwigo-random-backend.php but it doesnt work :-/