I have a few images in a node that can be opened in a fancybox lightbox. I would like to link those images together to create a gallery. To do so I need to add a rel attribute to my image link. How can I do this?

I tried editing the field.tpl.php template, but without any luck.

Help would really be appreciated.

  • You probably want hook_preprocess_link().
    – Alex Gill
    May 28, 2013 at 14:07
  • Could you point me in the right direction how I do that?
    – driesp
    May 28, 2013 at 14:08
  • Are you familiar with hooks?
    – Alex Gill
    May 28, 2013 at 14:23
  • No I'm afraid not. I only have knowledge of html, css & js...
    – driesp
    May 28, 2013 at 14:28
  • 1
    In your theme folder you have a file called 'template.php', here is where you implement 'hooks' on the theme layer to override core functionality. Have a look at origin-api.drupal.org/api/drupal/includes%21module.inc/group/… then have a look at this example drupalcode.org/project/icon.git/blob/… of how someone has used hook_preprocess_link in their module.
    – Alex Gill
    May 28, 2013 at 14:36

1 Answer 1


I need to add a rel attribute to my image link. How can I do this?

You can add a data attribute to your link in l() function:

// your image
$image = array(
    'style_name' => 'the name of the image style',
    'path' => 'relative path to your image',
    'alt' => '',
    'title' => '',
    'attributes' => array('class' => array('some_class'))

// link elements
$text = theme('image_style', $image); // in your case it's an image
$path = 'link_url';
$options = array(
    'attributes' => array(
        'class' => array('some_link_class'), 
        'rel' => 'some_relation'
    'html' => true

$link =  l($text, $path, $options);


<a class="some_link_class" rel="some_relation" href="/your_site/link_url">
    <img src="path to your image style" class="some_class" typeof="foaf:Image">

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