Sets Image Compression quality on a 1-100% scale.   
[ WP_Image_Editor::get_output_format() ](https://developer.wordpress.org/reference/classes/wp_image_editor/get_output_format/) ` wp-includes/class-wp-image-editor.php ` |  Returns preferred mime-type and extension based on provided file’s extension and mime, or current file’s extension and mime.   
[ WP_oEmbed::__construct() ](https://developer.wordpress.org/reference/classes/wp_oembed/__construct/) ` wp-includes/class-wp-oembed.php ` |  Constructor.   
[ WP_oEmbed::get_html() ](https://developer.wordpress.org/reference/classes/wp_oembed/get_html/) ` wp-includes/class-wp-oembed.php ` |  The do-it-all function that takes a URL and attempts to return the HTML.   
[ WP_oEmbed::discover() ](https://developer.wordpress.org/reference/classes/wp_oembed/discover/) ` wp-includes/class-wp-oembed.php ` |  Attempts to discover link tags at the given URL for an oEmbed provider.   
[ WP_oEmbed::fetch() ](https://developer.wordpress.org/reference/classes/wp_oembed/fetch/) ` wp-includes/class-wp-oembed.php ` |  Connects to an oEmbed provider and returns the result.   
[ WP_oEmbed::_fetch_with_format() ](https://developer.wordpress.org/reference/classes/wp_oembed/_fetch_with_format/) ` wp-includes/class-wp-oembed.php ` |  Fetches result from an oEmbed provider for a specific format and complete provider URL   
[ WP_oEmbed::data2html() ](https://developer.wordpress.org/reference/classes/wp_oembed/data2html/) ` wp-includes/class-wp-oembed.php ` |  Converts a data object from WP_oEmbed::fetch() and returns the HTML.   
[ wp_admin_bar_my_sites_menu() ](https://developer.wordpress.org/reference/functions/wp_admin_bar_my_sites_menu/) ` wp-includes/admin-bar.php ` |  Adds the “My Sites/[Site Name]” menu and all submenus.   
[ is_admin_bar_showing() ](https://developer.wordpress.org/reference/functions/is_admin_bar_showing/) ` wp-includes/admin-bar.php ` |  Determines whether the admin bar should be showing.   
[ _wp_admin_bar_init() ](https://developer.wordpress.org/reference/functions/_wp_admin_bar_init/) ` wp-includes/admin-bar.php ` |  Instantiates the admin bar object and set it up as a global for access elsewhere.   
[ get_the_category_rss() ](https://developer.wordpress.org/reference/functions/get_the_category_rss/) ` wp-includes/feed.php ` |  Retrieves all of the post categories, formatted for use in feeds.   
[ rss_enclosure() ](https://developer.wordpress.org/reference/functions/rss_enclosure/) ` wp-includes/feed.php ` |  Displays the rss enclosure for the current post.   
[ atom_enclosure() ](https://developer.wordpress.org/reference/functions/atom_enclosure/) ` wp-includes/feed.php ` |  Displays the atom enclosure for the current post.   
[ self_link() ](https://developer.wordpress.org/reference/functions/self_link/) ` wp-includes/feed.php ` |  Displays the link for the currently displayed feed in a XSS safe way.   
[ feed_content_type() ](https://developer.wordpress.org/reference/functions/feed_content_type/) ` wp-includes/feed.php ` |  Returns the content type for specified feed type.   
[ fetch_feed() ](https://developer.wordpress.org/reference/functions/fetch_feed/) ` wp-includes/feed.php ` |  Builds SimplePie object based on RSS or Atom feed from URL.   
[ get_the_content_feed() ](https://developer.wordpress.org/reference/functions/get_the_content_feed/) ` wp-includes/feed.php ` |  Retrieves the post content for feeds.   
[ the_excerpt_rss() ](https://developer.wordpress.org/reference/functions/the_excerpt_rss/) ` wp-includes/feed.php ` |  Displays the post excerpt for the feed.   
[ the_permalink_rss() ](https://developer.wordpress.org/reference/functions/the_permalink_rss/) ` wp-includes/feed.php ` |  Displays the permalink to the post for use in feeds.   
[ comments_link_feed() ](https://developer.wordpress.org/reference/functions/comments_link_feed/) ` wp-includes/feed.php ` |  Outputs the link to the comments for the current post in an XML safe way.   
[ comment_link() ](https: