_navigation_markup() │ WP 4.1.0

Wraps passed links in navigational markup.

This is an internal function for using it by WP core itself. It's not recommended to use this function in your code.

Used By: get_the_comments_pagination(), get_the_comments_navigation(), get_the_posts_pagination(), get_the_posts_navigation()
Hooks from the function

Return

String. Navigation template tag.

Usage

_navigation_markup( $links, $class, $screen_reader_text, $aria_label );
$links(string) (required)
Navigational links.
$class(string)
Custom class for the nav element.
Default: 'posts-navigation'
$screen_reader_text(string)
Screen reader text for the nav element.
Default: 'Posts navigation'
$aria_label(string)
ARIA label for the nav element.
Default: value of $screen_reader_text

Changelog

Since 4.1.0 Introduced.
Since 5.3.0 Added the aria_label parameter.

Code of _navigation_markup() WP 6.0

wp-includes/link-template.php 
function _navigation_markup( $links, $class = 'posts-navigation', $screen_reader_text = '', $aria_label = '' ) {
	if ( empty( $screen_reader_text ) ) {
		$screen_reader_text = __( 'Posts navigation' );
	}
	if ( empty( $aria_label ) ) {
		$aria_label = $screen_reader_text;
	}

	$template = '
	<nav class="navigation %1$s" aria-label="%4$s">
		<h2 class="screen-reader-text">%2$s</h2>
		<div class="nav-links">%3$s</div>
	</nav>';

	/**
	 * Filters the navigation markup template.
	 *
	 * Note: The filtered template HTML must contain specifiers for the navigation
	 * class (%1$s), the screen-reader-text value (%2$s), placement of the navigation
	 * links (%3$s), and ARIA label text if screen-reader-text does not fit that (%4$s):
	 *
	 *     <nav class="navigation %1$s" aria-label="%4$s">
	 *         <h2 class="screen-reader-text">%2$s</h2>
	 *         <div class="nav-links">%3$s</div>
	 *     </nav>
	 *
	 * @since 4.4.0
	 *
	 * @param string $template The default template.
	 * @param string $class    The class passed by the calling function.
	 * @return string Navigation template.
	 */
	$template = apply_filters( 'navigation_markup_template', $template, $class );

	return sprintf( $template, sanitize_html_class( $class ), esc_html( $screen_reader_text ), $links, esc_html( $aria_label ) );
}

Navigation pagination