Add an anchor to a generated link

OK – I will do a little testing and get back to you. Please show me a ‘before’ and ‘after’ example or two so I can be sure we are on the same page about what you want.

OK. That’s what I was looking for. Here is some code to try. Note that it is not exhaustively tested. I count on you to test it. Place this in functions.php:

<?php
 function mam_add_anchor ($anchor,$link) {
   // Adds the anchor $anchor to $link.
   // First, make sure $anchor has a leading #
   if (!preg_match('/^#/',$anchor)) $anchor = '#' . $anchor;

   if (strpos($link,'href')) {
     $hrefpat = '/(href *= *([\"\']?)([^\"\' ]+)\2)/';
   } else {
     $hrefpat = '/(([\"\']?)(http([^\"\' ]+))\2)/';
   }
   if (preg_match($hrefpat,$link,$matches)) {
      $url = $matches[3];
      // If there are other parameters, just add to end.
      // Otherwise, make sure there is a trailing slash on the url.
      if (strpos($url,'?')) {
        $newurl = $url;
      } else {
        $newurl = trailingslashit($url);
      }
      $newurl = $newurl . $anchor;
      // echo '<p>OLDURL:' . htmlspecialchars($url) . '</p>';
      // echo '<p>NEWURL:' . htmlspecialchars($newurl) . '</p>';
      $link = str_replace($url,$newurl,$link);
   }

   return $link;
}
function mam_post_link_add_anchor ($link) {
     global $mam_add_anchor;
     if ($mam_add_anchor) $link = mam_add_anchor($mam_add_anchor,$link);
     return $link;
   }
add_filter('previous_post_link','mam_post_link_add_anchor');
add_filter('next_post_link','mam_post_link_add_anchor');

And, add this line before your nav code:

$mam_add_anchor = 'LLScontent';