Limit the size of the existing and new permalink slugs in Wordpress for SEO

Question

 read an article on Google that says for good SEO it is best that the size of the slug in the URL is limited to 5 words.

As I use WordPress the link is assigned automatically to the article title. To redo all the links with just 5 words I would have to spend months editing all the links on my blog.

Would it be possible to do this automatically? There is some function or code for that. I found this code and added it to the function page of my theme and had no results.

See the code:

function pm_limit_slugs_length($uri) {
    $max_words = 5; // If any part of URI contains more than 5 words, the slug will be limited to first 5 words
    $new_title = '';
    $slugs = explode('/', $uri);
    
    for($i=0, $count = count($slugs); $i < $count; $i++) {
        $slug = $slugs[$i];
        $words = explode('-', $slug);
        
        $new_title .= "/";
        if(count($words) > $max_words) {
            $new_title .= implode("-", array_slice($words, 0, $max_words));
        } else {
            $new_title .= $slug;
        }
    }
    
    // Remove trailing slashes
    $new_title = trim($new_title, "/");
    
    return $new_title;
}
add_filter('permalink_manager_filter_default_post_uri', 'pm_limit_slugs_length', 99);
add_filter('permalink_manager_filter_default_term_uri', 'pm_limit_slugs_length', 99);

I found the code here: https://permalinkmanager.pro/docs/filters-hooks/how-to-limit-the-number-of-words-in-wordpress-permalinks/

How can I use it to limit the Wordpress slug size to 5 words?

Answer 1

?php  
/**
 * Trim native slugs
 */
function pm_trim_native_slug($slug, $post_ID, $post_status, $post_type, $post_parent) {
    global $wpdb;

    $max_words = 5; // Limit the number of words to 5; This value can be changed.
    $words = explode('-', $slug);

    /* UPDATED CODE TO REMOVE SHORT WORDS */
    $min_word_length = 2;

    foreach ($words as $k => $word) {
        if (strlen($word) <= $min_word_length)
            unset($words[$k]);
    }
    /* END OF UPDATED CODE FOR SHORT WORDS */

    if(count($words) > $max_words) {
        $slug = implode("-", array_slice($words, 0, $max_words));

        // Make the slugs unique
        $check_sql       = "SELECT post_name FROM $wpdb->posts WHERE post_name = %s AND ID != %d LIMIT 1";
        $post_name_check = $wpdb->get_var($wpdb->prepare($check_sql, $slug, $post_ID));

        if($post_name_check) {
            $suffix = 2;
            do {
                $alt_post_name = _truncate_post_slug($slug, 200 - (strlen($suffix) + 1)) . "-$suffix";
                $post_name_check = $wpdb->get_var($wpdb->prepare($check_sql, $alt_post_name, $post_type, $post_ID, $post_parent));
                $suffix++;
            } while ($post_name_check);
            $slug = $alt_post_name;
        }
    }

    return $slug;
}
add_filter('wp_unique_post_slug', 'pm_trim_native_slug', 99, 5);

this code is to automatically remove short words from url
after this update the eisting slugs

<?php
    include('wp-load.php');           //Include the wp-load.php file
    define('WP_USE_THEMES', false);   //We don't need the theme files

    echo "<p>About to update all slugs...</p>";
    limit_all_existing_slugs();
    echo "<p>...DONE</p>";
?>

call this function to update the slugs