WordPress免插件去除分类category

/* 

 * no category

 * ====================================================

*/

// if( function_exists('no_category_base_refresh_rules') ) return;

register_activation_hook(__FILE__, '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;

}

// For Debugging

//add_filter('rewrite_rules_array', 'no_category_base_rewrite_rules_array');

//function no_category_base_rewrite_rules_array($category_rewrite) {

//  var_dump($category_rewrite); // For Debugging

//}

// 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;

}