Cat + Tag Filter

Such a wonderfull plugin. Very like it. Thanks @ajayver and hope you are fine.Here is an updated code with PHP8.3 fix. Use on your own risk. Removed the links here for comment approval, but keep them on your file – its the creditsReplace the code of cat-tag-filter.php with the following code: <?php/*Plugin Name: Cat + Tag FilterPlugin URI: wordpress dot org/extend/plugins/cat-tag-filter-widget/Description: This plugin adds a widget to your WordPress site that allows your visitors to filter posts by category and tag.Author: Ajay VermaVersion: 0.9.1Author URI: ajayver dot com/*//* Copyright 2011 Verma Ajay (email : ajayverma1986@gmail dot com)*/if (isset($_POST[”ctf_submit”]) && $_POST[”ctf_submit”] == 1) { //if submit button was pressedrequire( ‘../../../wp-load.php’ ); //require wordpress core functions$cat = ”; //initialize variables for category and tag parts of the url$tag = ”;$tag_prefix = $_POST[”tag_prefix”] .’/’; //get tag and category prefix$cat_prefix = $_POST[”cat_prefix”] .’/’;if ($_POST[”tag_logic”] == 1) $tag_logic = ‘+’; //logic for tags (AND or OR)else $tag_logic = ‘,’;if ($_POST[”cat”] != -1) { //if a category was chosen$_POST[’cat’] = get_term($_POST[’cat’], $_POST[’category_tax’]); //get category slug from it’s id$cat = ‘/’. $cat_prefix . $_POST[’cat’]->slug; //add it to category part of the url$tag_prefix = ‘/’ . $_POST[”tag_prefix”] . ‘/’; //add & to tag part of url}if ($_POST[”tag”] && $_POST[”tag”][0] != -1) { //if any tags were chosen$tag .= $tag_prefix; //add tag prefix to tag part of url$i = 0;foreach ($_POST[”tag”] as $tags){if ($i > 0) $tag .= $tag_logic; //add all tags with ‘,’ or ‘+’ between them depends on logic$tag .= $tags;$i++;}}if ($cat == ” && $tag == ” && $_POST[”blog_url”] != ”) $url = $_POST[”home_url”] . ‘/’ . $_POST[”blog_url”]; //if no category or no tag was chosen, just create a link to blogelse $url = $_POST[”home_url”]. ‘/’ . $cat . $tag; //else, create a link to blog + category and tag argumentsheader(‘Location: ‘ . $url); //redirect user to the created urlexit;}else {if (basename($_SERVER[’SCRIPT_NAME’]) == basename(__FILE__)) exit(‘Please do not load this page directly’);}function current_tax() { //determine current tag and categoryglobal $wp_query, $ctf_options, $current_tax;$queries = $wp_query->tax_query->queries;if(!empty($queries)){foreach ($queries as $query) {if ($query[’taxonomy’] == $ctf_options[’tag_tax’]) $current_tax[’tags’] = $query[’terms’];else if ($query[’taxonomy’] == $ctf_options[’category_tax’]) $current_tax[’cats’] = $query[’terms’];}if(!empty($current_tax[’cats’])){foreach ($current_tax[’cats’] as $current_cat => $value) {$cat_id = get_term_by(‘slug’, $value, $ctf_options[’category_tax’]);$current_tax[’cats’][$current_cat] = $cat_id->term_id;}}return $current_tax;}}function cat_options(){ //get categories dropdown listglobal $ctf_options, $categories, $current_tax;$args = array(‘show_option_none’ => $ctf_options[’all_cats_text’],’taxonomy’ => $ctf_options[’category_tax’],’show_count’ => $ctf_options[’cats_count’],’pad_counts’ => 1,’hierarchical’ => 1,’selected’ => $current_tax[’cats’][0],$ctf_options[’clude_cats’] => $ctf_options[’exclude_cats’],’orderby’ => ‘name’);wp_dropdown_categories($args);}function tag_options($type){ //get tagsglobal $ctf_options, $current_tax;$there_are_tags = true;$args = array();if(!empty($current_tax[’cats’][0]) && $ctf_options[’corresponding_tags’] == 1){$cat_args = array(‘cat’ => $current_tax[’cats’][0],’posts_per_page’ => -1);query_posts($cat_args);if(have_posts()): while (have_posts()) : the_post();$all_tag_objects = get_the_terms($post->ID, $ctf_options[’tag_tax’]);if($all_tag_objects){foreach($all_tag_objects as $tag) {if($tag->count > 0) $all_tag_ids[] = $tag->term_id;echo ‘<!–‘ . $tag->term_id . ‘–>’;}}endwhile;endif;wp_reset_query();if (isset($all_tag_ids)){$tags = array_unique($all_tag_ids);$include = ”;if ($ctf_options[’exclude_tags’] != ”){$ctf_options[’exclude_tags’] = str_replace(” “, “”, $ctf_options[’exclude_tags’]);$exclude = explode(‘,’, $ctf_options[’exclude_tags’]);if ($ctf_options[’clude_tags’] == ‘include’) {foreach ($tags as $tag){if (in_array($tag, $exclude)) $include .= $tag . ‘,’;}}else if ($ctf_options[’clude_tags’] == ‘exclude’) {foreach ($tags as $tag){if (!in_array($tag, $exclude)) $include .= $tag . ‘,’;}}if ($include == ”) $there_are_tags = false;}else {foreach ($tags as $tag){$include .= $tag . ‘,’;}}$include = substr($include, 0, -1);$args[’include’] = $include;}else $there_are_tags = false;}else {$args[$ctf_options[’clude_tags’]] = $ctf_options[’exclude_tags’];}if ($there_are_tags) $tags = get_terms($ctf_options[’tag_tax’],$args);$options = ”;if ($type == 1){if ($there_are_tags){$options .= ‘<ul>’;foreach ($tags as $tag) {$options .= ‘<li>’;$options .= ‘<input type=”checkbox” name=”‘;$options .= “tag[]”;$options .= ‘” value=”‘ . $tag->slug . ‘”‘;if (is_array($current_tax[’tags’])) {if (in_array($tag->slug, $current_tax[’tags’])) $options .= ‘ checked ‘;}$options .= ‘>’;$options .= $tag->name;if ($ctf_options[’tags_count’] == 1) $options .= ‘ (‘ . $tag->count . ‘)’;$options .= ‘</li>’;}$options .= ‘</ul>’;}else $options .= ‘<ul><li><input type=”checkbox” name=”tag[]” value=”-1″ disabled>’ . __(‘No tags here’, ‘cat-tag-filter’) . ‘</li></ul>’;}else {if ($there_are_tags){$options .= ‘<select name=”‘ . “tag[]” . ‘” id=”ctf-tag-select” ><option value=”-1″>’;if ($ctf_options[’all_tags_text’] != ”) $options .= $ctf_options[’all_tags_text’];else $options .=__(‘Any tag’, ‘cat-tag-filter’);$options .= ‘</option>’;foreach ($tags as $tag) {$options .= ‘<option value=”‘ . $tag->slug . ‘”‘;if (is_array($current_tax[’tags’])) {if (in_array($tag->slug, $current_tax[’tags’])) $options .= ‘ selected=”selected” ‘;}$options .= ‘>’;$options .= $tag->name;if ($ctf_options[’tags_count’] == 1) $options .= ‘ (‘ . $tag->count . ‘)’;$options .= ‘</option>’;}$options .= ‘</select>’;}else $options .= ‘<select name=”tag[]” id=”ctf-tag-select” disabled ><option value=”-1″>’ . __(‘No tags here’, ‘cat-tag-filter’) . ‘</option></select>’;}return $options;}function ctf_widget(){global $ctf_options;current_tax();?><form action=”<?php echo get_bloginfo(‘wpurl’) . ‘/’ . PLUGINDIR . ‘/’ . dirname(plugin_basename(__FILE__)) . ‘/cat-tag-filter.php’; ?>” method=”post”><div id=”ctf-category-selector” <?php if ($ctf_options[’cat_list_hide’]) echo ‘style=”display:none;”‘; ?> ><?php if ($ctf_options[’cat_list_label’]) echo ‘<label for=”ctf-cat-select”>’ . $ctf_options[’cat_list_label’] . ‘</label>’; ?><?php cat_options(); ?></div><div id=”ctf-tag-selector”><?php if ($ctf_options[’tag_list_label’]) echo ‘<label for=”ctf-tag-select”>’ . $ctf_options[’tag_list_label’] . ‘</label>’; ?><?php echo tag_options($ctf_options[’tag_type’]); ?></div><input type=”hidden” name=”ctf_submit” value=”1″ /><input type=”hidden” name=”home_url” value=”<?php bloginfo(‘url’); ?>” /><input type=”hidden” name=”blog_url” value=”<?php $blog_url = get_option( ‘page_for_posts’); if ($blog_url != 0) echo get_page_uri($blog_url); ?>” /><input type=”hidden” name=”tag_logic” value=”<?php echo $ctf_options[’tag_logic’] ?>” /><?php $taxonomies=get_taxonomies(”,”,”); ?><input type=”hidden” name=”tag_prefix” value=”<?php echo $taxonomies[$ctf_options[’tag_tax’]]->rewrite[’slug’] ?>” /><input type=”hidden” name=”category_tax” value=”<?php echo $ctf_options[’category_tax’] ?>” /><input type=”hidden” name=”cat_prefix” value=”<?php echo $taxonomies[$ctf_options[’category_tax’]]->rewrite[’slug’] ?>” /><input id=”ctf-submit” class=”button” type=”submit” value=”<?php echo $ctf_options[’button_title’]; ?>”/></form><?php}/*** Cat + Tag Filter Class*/class cat_tag_filter extends WP_Widget {/** constructor */function __construct() {$widget_ops = array(‘classname’ => ‘cat-tag-filter’, ‘description’ => __(‘Filter posts by category and tag’, ‘cat_tag_filter’) );parent::__construct(false, $name = ‘Cat + Tag Filter’, $widget_ops);}static function install() {flush_rewrite_rules();}/** @see WP_Widget::widget */function widget($args, $instance) {$defaults = array( ‘title’ => __(‘Filter’, ‘cat-tag-filter’), ‘button_title’ => __(‘Show posts’, ‘cat-tag-filter’), ‘cat_list_hide’ => false, ‘cat_list_label’ => __(‘Show posts from:’, ‘cat-tag-filter’), ‘tag_list_label’ => __(‘With tag:’, ‘cat-tag-filter’), ‘all_cats_text’ => __(‘Any category’, ‘cat-tag-filter’), ‘all_tags_text’ => __(‘Any tag’, ‘cat-tag-filter’), ‘corresponding_tags’ => ‘1’, ‘cats_count’ => 1, ‘tags_count’ => 0, ‘tag_logic’ => 1, ‘tag_type’ => 0, ‘exclude_tags’ => ”, ‘exclude_cats’ => ”, ‘clude_tags’ => ‘exclude’, ‘clude_cats’ => ‘exclude’, ‘tag_tax’ => ‘post_tag’, ‘category_tax’ => ‘category’);$instance = wp_parse_args( (array) $instance, $defaults );extract( $args );global $ctf_options;$ctf_options[’title’] = apply_filters(‘widget_title’, $instance[’title’]);$ctf_options[’button_title’] = apply_filters(‘widget_title’, $instance[’button_title’]);$ctf_options[’cat_list_hide’] = $instance[’cat_list_hide’];$ctf_options[’cat_list_label’] = apply_filters(‘widget_title’, $instance[’cat_list_label’]);$ctf_options[’tag_list_label’] = apply_filters(‘widget_title’, $instance[’tag_list_label’]);$ctf_options[’all_cats_text’] = apply_filters(‘widget_title’, $instance[’all_cats_text’]);$ctf_options[’all_tags_text’] = apply_filters(‘widget_title’, $instance[’all_tags_text’]);$ctf_options[’cats_count’] = $instance[’cats_count’];$ctf_options[’corresponding_tags’] = $instance[’corresponding_tags’];$ctf_options[’tags_count’] = $instance[’tags_count’];$ctf_options[’tag_logic’] = $instance[’tag_logic’];$ctf_options[’tag_type’] = $instance[’tag_type’];$ctf_options[’exclude_tags’] = $instance[’exclude_tags’];$ctf_options[’clude_tags’] = $instance[’clude_tags’];$ctf_options[’exclude_cats’] = $instance[’exclude_cats’];$ctf_options[’clude_cats’] = $instance[’clude_cats’];$ctf_options[’category_tax’] = $instance[’category_tax’];$ctf_options[’tag_tax’] = $instance[’tag_tax’];echo $before_widget;if ( $ctf_options[’title’] ) echo $before_title . $ctf_options[’title’] . $after_title;ctf_widget();echo $after_widget;}/** @see WP_Widget::update */function update($new_instance, $old_instance) {$instance = $old_instance;$instance[’title’] = strip_tags($new_instance[’title’]);$instance[’button_title’] = strip_tags($new_instance[’button_title’]);$instance[’cat_list_hide’] = $new_instance[’cat_list_hide’];$instance[’cat_list_label’] = strip_tags($new_instance[’cat_list_label’]);$instance[’tag_list_label’] = strip_tags($new_instance[’tag_list_label’]);$instance[’all_cats_text’] = strip_tags($new_instance[’all_cats_text’]);$instance[’all_tags_text’] = strip_tags($new_instance[’all_tags_text’]);$instance[’cats_count’] = $new_instance[’cats_count’];$instance[’corresponding_tags’] = $new_instance[’corresponding_tags’];$instance[’tags_count’] = $new_instance[’tags_count’];$instance[’tag_logic’] = $new_instance[’tag_logic’];$instance[’tag_type’] = $new_instance[’tag_type’];$instance[’exclude_tags’] = $new_instance[’exclude_tags’];$instance[’exclude_cats’] = $new_instance[’exclude_cats’];$instance[’clude_tags’] = $new_instance[’clude_tags’];$instance[’clude_cats’] = $new_instance[’clude_cats’];$instance[’category_tax’] = $new_instance[’category_tax’];$instance[’tag_tax’] = $new_instance[’tag_tax’];flush_rewrite_rules();return $instance;}/** @see WP_Widget::form */function form($instance) {$defaults = array( ‘title’ => __(‘Filter’, ‘cat-tag-filter’), ‘button_title’ => __(‘Show posts’, ‘cat-tag-filter’), ‘cat_list_hide’ => false, ‘cat_list_label’ => __(‘Show posts from:’, ‘cat-tag-filter’), ‘tag_list_label’ => __(‘With tag:’, ‘cat-tag-filter’), ‘all_cats_text’ => __(‘Any category’, ‘cat-tag-filter’), ‘all_tags_text’ => __(‘Any tag’, ‘cat-tag-filter’), ‘corresponding_tags’ => ‘1’, ‘cats_count’ => 1, ‘tags_count’ => 0, ‘tag_logic’ => 1, ‘tag_type’ => 0, ‘exclude_tags’ => ”, ‘exclude_cats’ => ”, ‘clude_tags’ => ‘exclude’, ‘clude_cats’ => ‘exclude’, ‘tag_tax’ => ‘post_tag’, ‘category_tax’ => ‘category’ );$instance = wp_parse_args( (array) $instance, $defaults );?><p><strong>Please consider donating 10 cents if you like this plugin! :)</strong> </p><p><a href=”goo dot gl/SCdKg”><img src=”paypalobjects dot com/en_US/i/btn/btn_donateCC_LG.gif” alt=”donate” /></a></p><p><label for=”ctf-widget-title”><?php _e(‘Widget title’, ‘cat-tag-filter’); ?>:</label><input type=”text” id=”ctf-widget-title” name=”<?php echo $this->get_field_name(‘title’); ?>” value=”<?php echo esc_attr($instance[’title’]);?>” /></p><p><input type=”checkbox” id=”ctf-cat-list-hide” name=”<?php echo $this->get_field_name(‘cat_list_hide’); ?>” value=”true” <?php if ($instance[’cat_list_hide’] == true) echo “checked “;?>/><label for=”ctf-cat-list-hide”><?php _e(‘Hide categories dropdown’, ‘cat-tag-filter’); ?></label></p><p><label for=”ctf-cat-list-title”><?php _e(‘Categories dropdown label’, ‘cat-tag-filter’); ?>:</label><input type=”text” id=”ctf-cat-list-title” name=”<?php echo $this->get_field_name(‘cat_list_label’); ?>” value=”<?php echo esc_attr($instance[’cat_list_label’]);?>” /></p><p><label for=”ctf-all-cats-text”><?php _e(‘All categories option text’, ‘cat-tag-filter’); ?>:</label><input type=”text” id=”ctf-all-cats-text” name=”<?php echo $this->get_field_name(‘all_cats_text’); ?>” value=”<?php echo esc_attr($instance[’all_cats_text’]);?>” /></p><p><input type=”checkbox” id=”ctf-cats-count” name=”<?php echo $this->get_field_name(‘cats_count’); ?>” value=”1″ <?php if ($instance[’cats_count’] == 1) echo “checked “;?>/><label for=”ctf-cats-count”><?php _e(‘Show categories post count’, ‘cat-tag-filter’); ?></label></p><p><label for=”ctf-exclude_cats”><?php _e(‘Coma separated category id\’s to ‘, ‘cat-tag-filter’); ?><select name=”<?php echo $this->get_field_name(‘clude_cats’); ?>” id=”ctf-clude-cats” ><option value=”exclude” <?php if ($instance[’clude_cats’] == ‘exclude’) echo ‘selected=”selected” ‘;?> ><?php _e(‘exclude’, ‘cat-tag-filter’); ?></option><option value=”include” <?php if ($instance[’clude_cats’] == ‘include’) echo ‘selected=”selected” ‘;?> ><?php _e(‘include’, ‘cat-tag-filter’); ?></option></select>:</label><input type=”text” id=”ctf-exclude_cats” name=”<?php echo $this->get_field_name(‘exclude_cats’); ?>” value=”<?php echo esc_attr($instance[’exclude_cats’]);?>” /></p><p><label for=”ctf-tag-list-title”><?php _e(‘Tags dropdown label’, ‘cat-tag-filter’); ?>:</label><input type=”text” id=”ctf-tag-list-title” name=”<?php echo $this->get_field_name(‘tag_list_label’); ?>” value=”<?php echo esc_attr($instance[’tag_list_label’])?>” /></p><p><label for=”ctf-all-tags-text”><?php _e(‘All tags option text’, ‘cat-tag-filter’); ?>:</label><input type=”text” id=”ctf-all-tags-text” name=”<?php echo $this->get_field_name(‘all_tags_text’); ?>” value=”<?php echo esc_attr($instance[’all_tags_text’]);?>” /></p><p><label for=”ctf-tag-type”><?php _e(‘How to show tags:’, ‘cat-tag-filter’); ?></label><select name=”<?php echo $this->get_field_name(‘tag_type’); ?>” id=”ctf-tag-type” ><option value=”0″ <?php if ($instance[’tag_type’] == 0) echo ‘selected=”selected” ‘;?> ><?php _e(‘Dropdown list’, ‘cat-tag-filter’); ?></option><option value=”1″ <?php if ($instance[’tag_type’] == 1) echo ‘selected=”selected” ‘;?> ><?php _e(‘Checkboxes’, ‘cat-tag-filter’); ?></option></select></p><p><label for=”ctf-tag-logic”><?php _e(‘Logic operator for multiple tags:’, ‘cat-tag-filter’); ?></label><select name=”<?php echo $this->get_field_name(‘tag_logic’); ?>” id=”ctf-tag-logic” ><option value=”0″ <?php if ($instance[’tag_logic’] == 0) echo ‘selected=”selected” ‘;?> ><?php _e(‘OR’, ‘cat-tag-filter’); ?></option><option value=”1″ <?php if ($instance[’tag_logic’] == 1) echo ‘selected=”selected” ‘;?> ><?php _e(‘AND’, ‘cat-tag-filter’); ?></option></select></p><p><input type=”checkbox” id=”ctf-tags-count” name=”<?php echo $this->get_field_name(‘tags_count’); ?>” value=”1″ <?php if ($instance[’tags_count’] == 1) echo “checked “;?>/><label for=”ctf-tags-count”><?php _e(‘Show tags post count’, ‘cat-tag-filter’); ?></label></p><p><input type=”checkbox” id=”ctf-corresponding-tags” name=”<?php echo $this->get_field_name(‘corresponding_tags’); ?>” value=”1″ <?php if ($instance[’corresponding_tags’] == 1) echo “checked “;?>/><label for=”ctf-corresponding-tags”><?php _e(‘Show only corresponding tags for current category’, ‘cat-tag-filter’); ?></label></p><p><label for=”ctf-exclude_tags”><?php _e(‘Coma separated tag id\’s to ‘, ‘cat-tag-filter’); ?><select name=”<?php echo $this->get_field_name(‘clude_tags’); ?>” id=”ctf-clude-tags” ><option value=”exclude” <?php if ($instance[’clude_tags’] == ‘exclude’) echo ‘selected=”selected” ‘;?> ><?php _e(‘exclude’, ‘cat-tag-filter’); ?></option><option value=”include” <?php if ($instance[’clude_tags’] == ‘include’) echo ‘selected=”selected” ‘;?> ><?php _e(‘include’, ‘cat-tag-filter’); ?></option></select>:</label><input type=”text” id=”ctf-exclude_tags” name=”<?php echo $this->get_field_name(‘exclude_tags’); ?>” value=”<?php echo esc_attr($instance[’exclude_tags’]);?>” /></p><p><label for=”ctf-tag-tax”><?php _e(‘Custom taxonomy name for tags’, ‘cat-tag-filter’); ?>:</label><input type=”text” id=”ctf-tag-tax” name=”<?php echo $this->get_field_name(‘tag_tax’); ?>” value=”<?php echo esc_attr($instance[’tag_tax’]);?>” /></p><p><label for=”ctf-category-tax”><?php _e(‘Custom taxonomy name for categories’, ‘cat-tag-filter’); ?>:</label><input type=”text” id=”ctf-category-tax” name=”<?php echo $this->get_field_name(‘category_tax’); ?>” value=”<?php echo esc_attr($instance[’category_tax’]);?>” /></p><ul><?php _e(‘List of registered taxonomies’, ‘cat-tag-filter’); ?>:<?php$taxonomies=get_taxonomies(”,’names’);foreach ($taxonomies as $taxonomy ) {echo ‘<li>’. $taxonomy. ‘</li>’;}?></ul><p><label for=”ctf-button-title”><?php _e(‘Button title’, ‘cat-tag-filter’); ?>:</label><input type=”text” id=”ctf-button-title” name=”<?php echo $this->get_field_name(‘button_title’); ?>” value=”<?php echo esc_attr($instance[’button_title’]);?>” /></p><?php}} // class Cat + Tag Filter// register Cat + Tag Filter widgetif (function_exists(‘load_plugin_textdomain’)){load_plugin_textdomain(‘cat-tag-filter’, ‘/’ .PLUGINDIR. ‘/’ .dirname(plugin_basename(__FILE__)) . ‘/languages/’ );}add_action(‘widgets_init’, function() { return register_widget(“cat_tag_filter”); });function add_rewrite_rules() {global $wp_rewrite;$ctf_options = get_option(‘widget_cat_tag_filter’);foreach ($ctf_options as $widget_options){if ($widget_options[’category_tax’]){$taxonomies = get_taxonomies(”,”,”);$new_rules = array($taxonomies[$widget_options[’category_tax’]]->rewrite[’slug’] . ‘/(.+?)/’ . $taxonomies[$widget_options[’tag_tax’]]->rewrite[’slug’] . ‘/(.+?)/page/?([0-9]{1,})/?$’ => ‘index.php?’ . $taxonomies[$widget_options[’category_tax’]]->query_var . ‘=’ . $wp_rewrite->preg_index(1) . ‘&’ . $taxonomies[$widget_options[’tag_tax’]]->query_var . ‘=’ . $wp_rewrite->preg_index(2) . ‘&paged=’ . $wp_rewrite->preg_index(3),$taxonomies[$widget_options[’category_tax’]]->rewrite[’slug’] . ‘/(.+?)/’ . $taxonomies[$widget_options[’tag_tax’]]->rewrite[’slug’] . ‘/(.+?)/?$’ => ‘index.php?’ . $taxonomies[$widget_options[’category_tax’]]->query_var . ‘=’ . $wp_rewrite->preg_index(1) . ‘&’ . $taxonomies[$widget_options[’tag_tax’]]->query_var . ‘=’ . $wp_rewrite->preg_index(2));$wp_rewrite->rules = $new_rules + $wp_rewrite->rules;}}}add_action( ‘generate_rewrite_rules’, ‘add_rewrite_rules’ );register_activation_hook( ‘cat-tag-filter-widget/cat-tag-filter.php’, array(‘cat_tag_filter’, ‘install’) );?>

<p>Doesn’t work on php8</p>

still working with current WP version