WordPress at a glance
filter is not described

the_shortlink filter-hook . WP 3.0.0

Filters the short link anchor tag for a post.

Usage

add_filter( 'the_shortlink', 'filter_function_name_2242', 10, 4 );
function filter_function_name_2242( $link, $shortlink, $text, $title ){
	// filter...

	return $link;
}
$link(string)
Shortlink anchor tag.
$shortlink(string)
Shortlink URL.
$text(string)
Shortlink's text.
$title(string)
Shortlink's title attribute.

Where the hook is called

the_shortlink()
the_shortlink
wp-includes/link-template.php 3725
$link = apply_filters( 'the_shortlink', $link, $shortlink, $text, $title );

Where the hook is used (in WP core)

Does not used.