How to remove the category from WordPress category directory URL links? (Note: I preserved the HTML tags and did not translate the brand name "WordPress")

This two days, the site owner's client asked the site owner to teach about removing Translated to American English: This two days, the WordPress site owner's client asked the WordPress site owner to teach about removing分类The method used by the site owner to modify the category in the directory is the oldest way: modifying the fixed.链接！

Open WP backend - Settings - Permalinks

Then write in English half-angle points in the category directory.

However, the problem occurred at this time: because such a setting requires a brand new website without category columns and articles, which would not cause errors, but the user's website already has articles, and this method would make the user's articles and category columns directly 404 error!

https://www.winrss.com/tutorial/wordpress-permalink.html

For this, the site owner had to use another method:

American English translation: we directly WP No category Base plugin's main code inserted into function.php

//去除分类标志代码
add_action( 'load-themes.php',  'no_category_base_refresh_rules');
 add_action('created_category', 'no_category_base_refresh_rules');
 add_action('edited_category', 'no_category_base_refresh_rules');
 add_action('delete_category', 'no_category_base_refresh_rules');
 function no_category_base_refresh_rules() {
     global $wp_rewrite;
     $wp_rewrite -> flush_rules();
 }
 // register_deactivation_hook(__FILE__, 'no_category_base_deactivate');
 // function no_category_base_deactivate() {
 //  remove_filter('category_rewrite_rules', 'no_category_base_rewrite_rules');
 //  // We don't want to insert our custom rules again
 //  no_category_base_refresh_rules();
 // }
 // Remove category base
 add_action('init', 'no_category_base_permastruct');
 function no_category_base_permastruct() {
     global $wp_rewrite, $wp_version;
     if (version_compare($wp_version, '3.4', '<')) {
         // For pre-3.4 support
         $wp_rewrite -> extra_permastructs['category'][0] = '%category%';
     } else {
         $wp_rewrite -> extra_permastructs['category']['struct'] = '%category%';
     }
 }
 // Add our custom category rewrite rules
 add_filter('category_rewrite_rules', 'no_category_base_rewrite_rules');
 function no_category_base_rewrite_rules($category_rewrite) {
     //var_dump($category_rewrite); // For Debugging
     $category_rewrite = array();
     $categories = get_categories(array('hide_empty' => false));
     foreach ($categories as $category) {
         $category_nicename = $category -> slug;
         if ($category -> parent == $category -> cat_ID)// recursive recursion
             $category -> parent = 0;
         elseif ($category -> parent != 0)
             $category_nicename = get_category_parents($category -> parent, false, '/', true) . $category_nicename;
         $category_rewrite['(' . $category_nicename . ')/(?:feed/)?(feed|rdf|rss|rss2|atom)/?$'] = 'index.php?category_name=$matches[1]&feed=$matches[2]';
         $category_rewrite['(' . $category_nicename . ')/page/?([0-9]{1,})/?$'] = 'index.php?category_name=$matches[1]&paged=$matches[2]';
         $category_rewrite['(' . $category_nicename . ')/?$'] = 'index.php?category_name=$matches[1]';
     }
     // Redirect support from Old Category Base
     global $wp_rewrite;
     $old_category_base = get_option('category_base') ? get_option('category_base') : 'category';
     $old_category_base = trim($old_category_base, '/');
     $category_rewrite[$old_category_base . '/(.*)$'] = 'index.php?category_redirect=$matches[1]';
     //var_dump($category_rewrite); // For Debugging
     return $category_rewrite;
 }
 // Add 'category_redirect' query variable
 add_filter('query_vars', 'no_category_base_query_vars');
 function no_category_base_query_vars($public_query_vars) {
     $public_query_vars[] = 'category_redirect';
     return $public_query_vars;
 }
 // Redirect if 'category_redirect' is set
 add_filter('request', 'no_category_base_request');
 function no_category_base_request($query_vars) {
     //print_r($query_vars); // For Debugging
     if (isset($query_vars['category_redirect'])) {
         $catlink = trailingslashit(get_option('home')) . user_trailingslashit($query_vars['category_redirect'], 'category');
         status_header(301);
         header("Location: $catlink");
         exit();
     }
     return $query_vars;
 }

Here is the translation of the text to American English: After putting the above code into the theme's function.php file and saving the fixed link settings, it finally removed the category directory link safely and effectively. Note: Since the input text is in Simplified Chinese, I translated it to American English as per your request. url Category labels!