wp-includes/link-template.php:2726Retrieves the post pages link navigation for previous and next pages.
$argsstring|arrayoptionalarray()$sepstringdefault: '—'
$prelabelstringdefault: '« Previous Page'
$nxtlabelstringdefault: 'Next Page »'
stringfunction get_posts_nav_link( $args = array() ) { global $wp_query; $return = ''; if ( ! is_singular() ) { $defaults = array( 'sep' => ' — ', 'prelabel' => __( '« Previous Page' ), 'nxtlabel' => __( 'Next Page »' ), ); $args = wp_parse_args( $args, $defaults ); $max_num_pages = $wp_query->max_num_pages; $paged = get_query_var( 'paged' ); // Only have sep if there's both prev and next results. if ( $paged < 2 || $paged >= $max_num_pages ) { $args['sep'] = ''; } if ( $max_num_pages > 1 ) { $return = get_previous_posts_link( $args['prelabel'] ); $return .= preg_replace( '/&([^#])(?![a-z]{1,8};)/i', '&$1', $args['sep'] ); $return .= get_next_posts_link( $args['nxtlabel'] ); } } return $return;}Introduced in 2.8.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/link-template.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.