wp_get_archives

	}

	/**
	 * Filters the description for a post type archive.
	 *
	 * @since 4.9.0
	 *
	 * @param string       $description   The post type description.
	 * @param WP_Post_Type $post_type_obj The post type object.
	 */
	return apply_filters( 'get_the_post_type_description', $description, $post_type_obj );
}

/**
 * Retrieve archive link content based on predefined or custom code.
 *
 * The format can be one of four styles. The 'link' for head element, 'option'
 * for use in the select element, 'html' for use in list (either ol or ul HTML
 * elements). Custom content is also supported using the before and after
 * parameters.
 *
 * The 'link' format uses the `<link>` HTML element with the **archives**
 * relationship. The before and after parameters are not used. The text
 * parameter is used to describe the link.
 *
 * The 'option' format uses the option HTML element for use in select element.
 * The value is the url parameter and the before and after parameters are used
 * between the text description.
 *
 * The 'html' format, which is the default, uses the li HTML element for use in
 * the list HTML elements. The before parameter is before the link and the after
 * parameter is after the closing link.
 *
 * The custom format uses the before parameter before the link ('a' HTML
 * element) and the after parameter after the closing link tag. If the above
 * three values for the format are not used, then custom format is assumed.
 *
 * @since 1.0.0
 * @since 5.2.0 Added the `$selected` parameter.
 *
 * @param string $url      URL to archive.
 * @param string $text     Archive text description.
 * @param string $format   Optional. Can be 'link', 'option', 'html', or custom. Default 'html'.
 * @param string $before   Optional. Content to prepend to the description. Default empty.
 * @param string $after    Optional. Content to append to the description. Default empty.
 * @param bool   $selected Optional. Set to true if the current page is the selected archive page.
 * @return string HTML link content for archive.
 */
function get_archives_link( $url, $text, $format = 'html', $before = '', $after = '', $selected = false ) {
	$text         = wptexturize( $text );
	$url          = esc_url( $url );
	$aria_current = $selected ? ' aria-current="page"' : '';

	if ( 'link' === $format ) {
		$link_html = "\t<link rel='archives' title='" . esc_attr( $text ) . "' href='$url' />\n";
	} elseif ( 'option' === $format ) {
		$selected_attr = $selected ? " selected='selected'" : '';
		$link_html     = "\t<option value='$url'$selected_attr>$before $text $after</option>\n";
	} elseif ( 'html' === $format ) {
		$link_html = "\t<li>$before<a href='$url'$aria_current>$text</a>$after</li>\n";
	} else { // Custom.
		$link_html = "\t$before<a href='$url'$aria_current>$text</a>$after\n";
	}

	/**
	 * Filters the archive link content.
	 *
	 * @since 2.6.0
	 * @since 4.5.0 Added the `$url`, `$text`, `$format`, `$before`, and `$after` parameters.
	 * @since 5.2.0 Added the `$selected` parameter.
	 *
	 * @param string $link_html The archive HTML link content.
	 * @param string $url       URL to archive.
	 * @param string $text      Archive text description.
	 * @param string $format    Link format. Can be 'link', 'option', 'html', or custom.
	 * @param string $before    Content to prepend to the description.
	 * @param string $after     Content to append to the description.
	 * @param bool   $selected  True if the current page is the selected archive.
	 */
	return apply_filters( 'get_archives_link', $link_html, $url, $text, $format, $before, $after, $selected );
}

/**
 * Display archive links based on type and format.
 *
 * @since 1.2.0
 * @since 4.4.0 The `$post_type` argument was added.
 * @since 5.2.0 The `$year`, `$monthnum`, `$day`, and `$w` arguments were added.
 *
 * @see get_archives_link()
 *
 * @global wpdb      $wpdb      WordPress database abstraction object.
 * @global WP_Locale $wp_locale WordPress date and time locale object.
 *
 * @param string|array $args {
 *     Default archive links arguments. Optional.
 *
 *     @type string     $type            Type of archive to retrieve. Accepts 'daily', 'weekly', 'monthly',
 *                                       'yearly', 'postbypost', or 'alpha'. Both 'postbypost' and 'alpha'
 *                                       display the same archive link list as well as post titles instead
 *                                       of displaying dates. The difference between the two is that 'alpha'
 *                                       will order by post title and 'postbypost' will order by post date.
 *                                       Default 'monthly'.
 *     @type string|int $limit           Number of links to limit the query to. Default empty (no limit).
 *     @type string     $format          Format each link should take using the $before and $after args.
 *                                       Accepts 'link' (`<link>` tag), 'option' (`<option>` tag), 'html'
 *                                       (`<li>` tag), or a custom format, which generates a link anchor
 *                                       with $before preceding and $after succeeding. Default 'html'.
 *     @type string     $before          Markup to prepend to the beginning of each link. Default empty.
 *     @type string     $after           Markup to append to the end of each link. Default empty.
 *     @type bool       $show_post_count Whether to display the post count alongside the link. Default false.
 *     @type bool|int   $echo            Whether to echo or return the links list. Default 1|true to echo.
 *     @type string     $order           Whether to use ascending or descending order. Accepts 'ASC', or 'DESC'.
 *                                       Default 'DESC'.
 *     @type string     $post_type       Post type. Default 'post'.
 *     @type string     $year            Year. Default current year.
 *     @type string     $monthnum        Month number. Default current month number.
 *     @type string     $day             Day. Default current day.
 *     @type string     $w               Week. Default current week.
 * }
 * @return void|string Void if 'echo' argument is true, archive links if 'echo' is false.
 */
function wp_get_archives( $args = '' ) {
	global $wpdb, $wp_locale;

	$defaults = array(
		'type'            => 'monthly',
		'limit'           => '',
		'format'          => 'html',
		'before'          => '',
		'after'           => '',
		'show_post_count' => false,
		'echo'            => 1,
		'order'           => 'DESC',
		'post_type'       => 'post',
		'year'            => get_query_var( 'year' ),
		'monthnum'        => get_query_var( 'monthnum' ),
		'day'             => get_query_var( 'day' ),
		'w'               => get_query_var( 'w' ),
	);

	$parsed_args = wp_parse_args( $args, $defaults );

	$post_type_object = get_post_type_object( $parsed_args['post_type'] );
	if ( ! is_post_type_viewable( $post_type_object ) ) {
		return;
	}

	$parsed_args['post_type'] = $post_type_object->name;

	if ( '' === $parsed_args['type'] ) {
		$parsed_args['type'] = 'monthly';
	}

	if ( ! empty( $parsed_args['limit'] ) ) {
		$parsed_args['limit'] = absint( $parsed_args['limit'] );
		$parsed_args['limit'] = ' LIMIT ' . $parsed_args['limit'];
	}

	$order = strtoupper( $parsed_args['order'] );
	if ( 'ASC' !== $order ) {
		$order = 'DESC';
	}

	// This is what will separate dates on weekly archive links.
	$archive_week_separator = '&#8211;';

	$sql_where = $wpdb->prepare( "WHERE post_type = %s AND post_status = 'publish'", $parsed_args['post_type'] );

	/**
	 * Filters the SQL WHERE clause for retrieving archives.
	 *
	 * @since 2.2.0
	 *
	 * @param string $sql_where   Portion of SQL query containing the WHERE clause.
	 * @param array  $parsed_args An array of default arguments.
	 */
	$where = apply_filters( 'getarchives_where', $sql_where, $parsed_args );

	/**
	 * Filters the SQL JOIN clause for retrieving archives.
	 *
	 * @since 2.2.0
	 *
	 * @param string $sql_join    Portion of SQL query containing JOIN clause.
	 * @param array  $parsed_args An array of default arguments.
	 */
	$join = apply_filters( 'getarchives_join', '', $parsed_args );

	$output = '';

	$last_changed = wp_cache_get_last_changed( 'posts' );

	$limit = $parsed_args['limit'];

	if ( 'monthly' === $parsed_args['type'] ) {
		$query   = "SELECT YEAR(post_date) AS `year`, MONTH(post_date) AS `month`, count(ID) as posts FROM $wpdb->posts $join $where GROUP BY YEAR(post_date), MONTH(post_date) ORDER BY post_date $order $limit";
		$key     = md5( $query );
		$key     = "wp_get_archives:$key:$last_changed";
		$results = wp_cache_get( $key, 'posts' );
		if ( ! $results ) {
			$results = $wpdb->get_results( $query );
			wp_cache_set( $key, $results, 'posts' );
		}
		if ( $results ) {
			$after = $parsed_args['after'];
			foreach ( (array) $results as $result ) {
				$url = get_month_link( $result->year, $result->month );
				if ( 'post' !== $parsed_args['post_type'] ) {
					$url = add_query_arg( 'post_type', $parsed_args['post_type'], $url );
				}
				/* translators: 1: Month name, 2: 4-digit year. */
				$text = sprintf( __( '%1$s %2$d' ), $wp_locale->get_month( $result->month ), $result->year );
				if ( $parsed_args['show_post_count'] ) {
					$parsed_args['after'] = '&nbsp;(' . $result->posts . ')' . $after;
				}
				$selected = is_archive() && (string) $parsed_args['year'] === $result->year && (string) $parsed_args['monthnum'] === $result->month;
				$output  .= get_archives_link( $url, $text, $parsed_args['format'], $parsed_args['before'], $parsed_args['after'], $selected );