WordPress at a glance
filter is not described

(adjacent)_image_link filter-hook . WP 3.5.0

Filters the adjacent image link.

The dynamic portion of the hook name, $adjacent, refers to the type of adjacency, either 'next', or 'previous'.

Usage

add_filter( '(adjacent)_image_link', 'filter_function_name_9649', 10, 4 );
function filter_function_name_9649( $output, $attachment_id, $size, $text ){
	// filter...

	return $output;
}
$output(string)
Adjacent image HTML markup.
$attachment_id(int)
Attachment ID
$size(string)
Image size.
$text(string)
Link text.

Where the hook is called

adjacent_image_link()
(adjacent)_image_link
wp-includes/media.php 2741
echo apply_filters( "{$adjacent}_image_link", $output, $attachment_id, $size, $text );

Where the hook is used (in WP core)

Does not used.