Hi I'm trying to rewrite permalink structure for posts in one specific category, the structure should be category name - author name - post title When I use the code below, there is no author name in the URL Please, advise me where am I wrong.

add_filter( 'post_link', 'custom_permalink', 'author_link', 10, 3 );
function custom_permalink( $permalink, $post, $leavename ) {
// Get the category for the post
$category = get_the_category($post->ID);
if (  !empty($category) && $category[0]->cat_name == "Tips" ) {
    $cat_name = strtolower($category[0]->cat_name);
    $author_nickname = get_user_meta( $author_id, 'nickname', true );
    $permalink = trailingslashit( home_url('/'. $cat_name . '/' . 
$author_nickname . '/' . $post->post_name .'/' ) );
}
return $permalink;
}

add_filter( 'category_link', 'custom_category_permalink', 10, 2 );
function custom_category_permalink( $link, $cat_id ) {
$slug = get_term_field( 'slug', $cat_id, 'category' );
if ( ! is_wp_error( $slug ) && 'tips' === $slug ) {
    $link = home_url( user_trailingslashit( '/tips/', 'category' ) );
}
return $link;
}

add_action( 'init', 'custom_rewrite_rules' );
function custom_rewrite_rules() {
add_rewrite_rule(
    'tips(?:/page/?([0-9]{1,})|)/?$',
    'index.php?category_name=tips&paged=$matches[1]',
    'top' // The rule position; either 'top' or 'bottom' (default).
);

add_rewrite_rule(
'tips/\d+/([^/]+)(?:/([0-9]+))?/?$', // <- here, add the \d+/
'index.php?category_name=tips&name=$matches[1]&page=$matches[2]',
'top'
);
}

Hi I'm trying to rewrite permalink structure for posts in one specific category, the structure should be category name - author name - post title When I use the code below, there is no author name in the URL Please, advise me where am I wrong.

add_filter( 'post_link', 'custom_permalink', 'author_link', 10, 3 );
function custom_permalink( $permalink, $post, $leavename ) {
// Get the category for the post
$category = get_the_category($post->ID);
if (  !empty($category) && $category[0]->cat_name == "Tips" ) {
    $cat_name = strtolower($category[0]->cat_name);
    $author_nickname = get_user_meta( $author_id, 'nickname', true );
    $permalink = trailingslashit( home_url('/'. $cat_name . '/' . 
$author_nickname . '/' . $post->post_name .'/' ) );
}
return $permalink;
}

add_filter( 'category_link', 'custom_category_permalink', 10, 2 );
function custom_category_permalink( $link, $cat_id ) {
$slug = get_term_field( 'slug', $cat_id, 'category' );
if ( ! is_wp_error( $slug ) && 'tips' === $slug ) {
    $link = home_url( user_trailingslashit( '/tips/', 'category' ) );
}
return $link;
}

add_action( 'init', 'custom_rewrite_rules' );
function custom_rewrite_rules() {
add_rewrite_rule(
    'tips(?:/page/?([0-9]{1,})|)/?$',
    'index.php?category_name=tips&paged=$matches[1]',
    'top' // The rule position; either 'top' or 'bottom' (default).
);

add_rewrite_rule(
'tips/\d+/([^/]+)(?:/([0-9]+))?/?$', // <- here, add the \d+/
'index.php?category_name=tips&name=$matches[1]&page=$matches[2]',
'top'
);
}

• permalinks

• I see you use $category[0], what if the post is in the category but it's $category[1] or $category[4]? Note that nicknames can be changed in the admin interface so they aren't good for use in URLs. Also, when you say there is no author in the URL can you be more specific? Do you mean links to that post have the wrong URL? You get the wrong canonical URL? Redirects? It's unclear. Can you fix the indenting on your code? – Tom J Nowell ♦ Commented Feb 16, 2020 at 1:48
• Yes, the author nickname doesn't appear in the URL. Thank you for noticing the category id. – MaksimL Commented Feb 16, 2020 at 2:28
• Is it possible to use author slug instead of nickname? The slug which remains unchanged if the nickname is changed? Slug of Usernames which cannot be changed – MaksimL Commented Feb 16, 2020 at 2:35
• I changed author to $author = get_the_author_meta( 'user_url', $user_id, true ); But still no author slug in the permalink structure – MaksimL Commented Feb 16, 2020 at 2:48

1 Answer 1

This code works good for me:

 add_filter( 'post_link', 'custom_permalink', 'author_link', 10, 3 );
 function custom_permalink( $permalink, $post, $leavename ) {
  // Get the category for the post
  $category = get_the_category($post->ID);
  if (  !empty($category) && $category[0]->cat_name == "Tips" ) {
    $cat_name = strtolower($category[0]->cat_name);
    $authordata = get_userdata( $post->post_author );
        $author     = $authordata->user_nicename;
    $permalink = trailingslashit( home_url('/'. $cat_name . '/' . $author . '/' .          
$post->post_name .'/' ) );
}
return $permalink;
}

add_filter( 'category_link', 'custom_category_permalink', 10, 2 );
function custom_category_permalink( $link, $cat_id ) {
$slug = get_term_field( 'slug', $cat_id, 'category' );
if ( ! is_wp_error( $slug ) && 'tips' === $slug ) {
    $link = home_url( user_trailingslashit( '/tips/', 'category' ) );
}
return $link;
}

add_action( 'init', 'custom_rewrite_rules' );
function custom_rewrite_rules() {
add_rewrite_rule(
    'tips(?:/page/?([0-9]{1,})|)/?$',
    'index.php?category_name=tips&paged=$matches[1]',
    'top' // The rule position; either 'top' or 'bottom' (default).
);

add_rewrite_rule(
'tips/\d+/([^/]+)(?:/([0-9]+))?/?$', // <- here, add the \d+/
'index.php?category_name=tips&name=$matches[1]&page=$matches[2]',
'top'
);
}