|wp-includes/formatting.php: esc_url()|| |
Checks and cleans a URL.
|wp-includes/link-template.php: get_permalink()|| |
Retrieves the full permalink for the current post or post ID.
|wp-includes/plugin.php: apply_filters()|| |
Calls the callback functions that have been added to a filter hook.
|wp-includes/feed.php: the_permalink_rss|| |
Filters the permalink to the post for use in feeds.