How can I add title attributes to next and previous post link functions?

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For some reason a title attribute is not appended to next_post_link and prev_post_link calls in WordPress. How can I add one?

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5 comments

  1. Update

    As I deleted the Repo on GitHub, here’s a new answer.

    add_filter( 'previous_post_link', 'wpse13044_adjacent_post_link_tooltip', 10, 2 );
add_filter( 'next_post_link', 'wpse13044_adjacent_post_link_tooltip', 10, 2 );
function wpse13044_adjacent_post_link_tooltip( $format, $link )
{
    $previous = 'previous_post_link' === current_filter();
    // Get the next/previous post object
    $post = get_adjacent_post(
         false
        ,''
        ,$previous
    );
    // Copypasta from cores `get_adjacent_post_link()` fn
    '' === $title = get_the_title( $post->ID );
        AND $title = $previous 
            ? sprint( __( 'Previous Post: %s', 'your_textdomain' ), $title )
            : sprint( __( 'Next Post: %s', 'your_textdomain' ), $title );

    $format = str_replace(
         'rel="'
        ,sprintf(
             'title="%s" rel="'
            ,$title
         )
        ,$format
    );

    return "<span class='some classes'>{$format}</span>";
}

  2. No need for functions and filters all you need to do is to use get_adjacent_post instead of next_post_link and prev_post_link, Note that get_adjacent_post is used to get previous and next post, you can read about it here
    To get previous post and it’s title attribute use this

    $prev_post = get_adjacent_post(false, '', true);
if(!empty($prev_post)) {
echo '<a href="' . get_permalink($prev_post->ID) . '" title="' . $prev_post->post_title . '">' . $prev_post->post_title . '</a>'; }

    To get next post and it’s title attribute use this

    $next_post = get_adjacent_post(false, '', false);
if(!empty($next_post)) {
echo '<a href="' . get_permalink($next_post->ID) . '" title="' . $next_post->post_title . '">' . $next_post->post_title . '</a>'; }

  3. I’m trying to do this right now as well. The filter function seems like the best bet.

    This is where I’m at now, but I can’t seem to get the title of the next or previous post and pass it to the filter.

    Edit: Figured it out. A bit hackey probably, but it works.

    add_filter('next_post_link','add_title_to_next_post_link');
function add_title_to_next_post_link($link) {
global $post;
$post = get_post($post_id);
$next_post = get_next_post();
$title = $next_post->post_title;
$link = str_replace("rel=", " title='".$title."' rel", $link);
return $link;
}

add_filter('previous_post_link','add_title_to_previous_post_link');
function add_title_to_previous_post_link($link) {
global $post;
$post = get_post($post_id);
$previous_post = get_previous_post();
$title = $previous_post->post_title;
$link = str_replace("rel=", " title='".$title."' rel", $link);
return $link;
}

  4. A bit old perhaps, and I wasn’t really sure on how to make a comment on a reply…

    In short, after looking for the same solution I’ve modified Picard102’s suggestion just a tiny bit:

    /**
 * Filter previous_post_link and next_post_link
 */
function filter_next_post_link($link) {
    global $post;
    $post = get_post($post_id);
    $next_post = get_next_post();
    $title = $next_post->post_title;
    $link = str_replace("rel=", 'title="' . $title . '" rel=', $link);
    return $link;
}
add_filter('next_post_link', 'filter_next_post_link');

function filter_previous_post_link($link) {
    global $post;
    $post = get_post($post_id);
    $previous_post = get_previous_post();
    $title = $previous_post->post_title;
    $link = str_replace("rel=", 'title="' . $title . '" rel=', $link);
    return $link;
}
add_filter('previous_post_link', 'filter_previous_post_link');

  5. Shortened the code a little.

    /*
 * Add "title=" to previous_post_link and next_post_link
 */

add_filter('next_post_link', function($link) {
  $next_post = get_next_post();
  $title = $next_post->post_title;
  $link = str_replace('href=', 'title="'.$title.'" href=', $link);
  return $link;
});

add_filter('previous_post_link', function($link) {
  $previous_post = get_previous_post();
  $title = $previous_post->post_title;
  $link = str_replace('href=', 'title="'.$title.'" href=', $link);
  return $link;
});