Edit Gallery Shortcode

the code is in /wp-includes/media.php (from line 747);

in functions.php of your theme, add this:

remove_shortcode('gallery', 'gallery_shortcode');
add_shortcode('gallery', 'gallery_shortcode_fancybox');

function gallery_shortcode_fancybox($attr) {
	global $post, $wp_locale;

	static $instance = 0;
.....
copy all the code from media.php until line 876
.....
			<br style='clear: both;' />
		</div>\n";

	return $output;
}

then make your edits there; this way you avoid hacking core files.

alchymyth,

Thanks, that helps, but I’m not sure where I add my html code class="fancy" rel="group1" – is it somewhere within the $link variable?

I should probably clarify that I’m simply trying to inject the html code into the img src for each thumbnail that gets generated in my galleries.

So it will look something like when I’m done:

<img width="93" height="93" src="https://localhost/global/wp-content/uploads/2011/06/01-93x93.jpg" class="attachment-thumbnail fancy" rel="group1" alt="img-01" title="img-01">

Thanks!

is it somewhere within the $link variable

yes – which makes it more complicated to acceess.

in the newly added code, before these lines:

$i = 0;
	foreach ( $attachments as $id => $attachment ) {

add:

add_filter('wp_get_attachment_link', 'add_rel_to_gallery');

then, after these lines:

$output .= '<br style="clear: both" />';
	}

add:

remove_filter('wp_get_attachment_link', 'add_rel_to_gallery');

finally, add this to functions.php of your theme, before the code you added earlier:

function add_rel_to_gallery($link) {
$link = str_replace('" alt="', ' fancy" rel="group1" alt="', $link);
return $link;
}

(untested)

everything for functions.php in one bit: https://pastebin.com/yH724Myb

alchymyth,

That code works, however I just realized I need to place that styles on the a tag of the image, like so:

<a href="https://localhost/global/wp-content/uploads/2011/06/brakingthecycle-01.jpg" title="brakingthecycle-01" class="fancy" rel="group1">

How could I modify $link to do that?

as before, use the filter; i.e. change:

function add_rel_to_gallery($link) {
$link = str_replace('" alt="', ' fancy" rel="group1" alt="', $link);
return $link;
}

into:

function add_rel_to_gallery($link) {
$link = str_replace("'><img", "' class=\"fancy\" rel=\"group1\" ><img", $link);
return $link;
}

Awesome. Thank you very much for your help alchymyth!

I’m looking to do the same thing, but instead of wanting to add a class to “fancyboxy” I’m looking to add a class to “highslide”.

Can I just say:
add_shortcode(‘gallery’, ‘gallery_shortcode_highslide’);
?

Thanks.