WP_Sitemaps_Posts::get_url_list() WordPress Method

	public function get_url_list( $page_num, $object_subtype = '' ) {
		// Restores the more descriptive, specific name for use within this method.
		$post_type = $object_subtype;

		// Bail early if the queried post type is not supported.
		$supported_types = $this->get_object_subtypes();

		if ( ! isset( $supported_types[ $post_type ] ) ) {
			return array();
		}

		/**
		 * Filters the posts URL list before it is generated.
		 *
		 * Returning a non-null value will effectively short-circuit the generation,
		 * returning that value instead.
		 *
		 * @since 5.5.0
		 *
		 * @param array[]|null $url_list  The URL list. Default null.
		 * @param string       $post_type Post type name.
		 * @param int          $page_num  Page of results.
		 */
		$url_list = apply_filters(
			'wp_sitemaps_posts_pre_url_list',
			null,
			$post_type,
			$page_num
		);

		if ( null !== $url_list ) {
			return $url_list;
		}

		$args          = $this->get_posts_query_args( $post_type );
		$args['paged'] = $page_num;

		$query = new WP_Query( $args );

		$url_list = array();

		/*
		 * Add a URL for the homepage in the pages sitemap.
		 * Shows only on the first page if the reading settings are set to display latest posts.
		 */
		if ( 'page' === $post_type && 1 === $page_num && 'posts' === get_option( 'show_on_front' ) ) {
			// Extract the data needed for home URL to add to the array.
			$sitemap_entry = array(
				'loc' => home_url( '/' ),
			);

			/**
			 * Filters the sitemap entry for the home page when the 'show_on_front' option equals 'posts'.
			 *
			 * @since 5.5.0
			 *
			 * @param array $sitemap_entry Sitemap entry for the home page.
			 */
			$sitemap_entry = apply_filters( 'wp_sitemaps_posts_show_on_front_entry', $sitemap_entry );
			$url_list[]    = $sitemap_entry;
		}

		foreach ( $query->posts as $post ) {
			$sitemap_entry = array(
				'loc' => get_permalink( $post ),
			);

			/**
			 * Filters the sitemap entry for an individual post.
			 *
			 * @since 5.5.0
			 *
			 * @param array   $sitemap_entry Sitemap entry for the post.
			 * @param WP_Post $post          Post object.
			 * @param string  $post_type     Name of the post_type.
			 */
			$sitemap_entry = apply_filters( 'wp_sitemaps_posts_entry', $sitemap_entry, $post, $post_type );
			$url_list[]    = $sitemap_entry;
		}

		return $url_list;
	}