├── admin-taxonomy-filter.php
├── inc
    ├── controller.php
    └── settings.php
└── readme.txt


/admin-taxonomy-filter.php:
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 1 | <?php
 2 | /**
 3 |  * Plugin Name: Admin Taxonomy Filter
 4 |  * Plugin URI:  https://elightup.com
 5 |  * Description: Filter posts or custom post types by taxonomy in the admin area.
 6 |  * Version:     1.0.4
 7 |  * Author:      eLightUp
 8 |  * Author URI:  https://elightup.com
 9 |  * License:     GPL2+
10 |  * Text Domain: admin-taxonomy-filter
11 |  * Domain Path: /languages/
12 |  */
13 | 
14 | defined( 'ABSPATH' ) || die;
15 | 
16 | if ( is_admin() ) {
17 | 	require __DIR__ . '/inc/controller.php';
18 | 	require __DIR__ . '/inc/settings.php';
19 | 
20 | 	new ATF_Controller;
21 | 	new ATF_Settings;
22 | }


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/inc/controller.php:
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 1 | <?php
 2 | class ATF_Controller {
 3 | 	/**
 4 | 	 * Current post type.
 5 | 	 */
 6 | 	public $post_type;
 7 | 
 8 | 	public function __construct() {
 9 | 		add_action( 'restrict_manage_posts', array( $this, 'output_filters' ) );
10 | 	}
11 | 
12 | 	/**
13 | 	 * Output filters in the All Posts screen.
14 | 	 *
15 | 	 * @param string $post_type The current post types.
16 | 	 */
17 | 	public function output_filters( $post_type ) {
18 | 		$this->post_type = $post_type;
19 | 		$taxonomies      = get_object_taxonomies( $post_type, 'objects' );
20 | 		$taxonomies      = array_filter( $taxonomies, array( $this, 'is_filterable' ) );
21 | 		array_walk( $taxonomies, array( $this, 'output_filter_for' ) );
22 | 	}
23 | 
24 | 	/**
25 | 	 * Check if we have some taxonomies to filter.
26 | 	 *
27 | 	 * @param \WP_Taxonomy $taxonomy The taxonomy object.
28 | 	 *
29 | 	 * @return bool
30 | 	 */
31 | 	protected function is_filterable( $taxonomy ) {
32 | 		// Post category is filterable by default.
33 | 		if ( 'post' === $this->post_type && 'category' === $taxonomy->name ) {
34 | 			return false;
35 | 		}
36 | 
37 | 		$option = get_option( 'admin_taxonomy_filter' );
38 | 		return isset( $option[ $this->post_type ] ) && in_array( $taxonomy->name, (array) $option[ $this->post_type ], true );
39 | 	}
40 | 
41 | 	/**
42 | 	 * Output filter for a taxonomy.
43 | 	 *
44 | 	 * @param \WP_Taxonomy $taxonomy The taxonomy object.
45 | 	 */
46 | 	protected function output_filter_for( $taxonomy ) {
47 | 		$selected = (string) filter_input( INPUT_GET, $taxonomy->query_var );
48 | 		wp_dropdown_categories( array(
49 | 			'show_option_all' => sprintf( __( 'All %s', 'admin-taxonomy-filter' ), $taxonomy->label ),
50 | 			'orderby'         => 'name',
51 | 			'order'           => 'ASC',
52 | 			'hide_empty'      => false,
53 | 			'hide_if_empty'   => true,
54 | 			'selected'        => $selected,
55 | 			'hierarchical'    => true,
56 | 			'name'            => $taxonomy->query_var,
57 | 			'taxonomy'        => $taxonomy->name,
58 | 			'value_field'     => 'slug',
59 | 		) );
60 | 	}
61 | }
62 | 


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/inc/settings.php:
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  1 | <?php
  2 | class ATF_Settings {
  3 | 	public function __construct() {
  4 | 		add_action( 'admin_menu', array( $this, 'add_menu_page' ) );
  5 | 		add_action( 'admin_init', array( $this, 'register_settings' ) );
  6 | 	}
  7 | 
  8 | 	public function add_menu_page() {
  9 | 		add_options_page(
 10 | 			__( 'Taxonomy Filter', 'admin-taxonomy-filter' ),
 11 | 			__( 'Taxonomy Filter', 'admin-taxonomy-filter' ),
 12 | 			'manage_options',
 13 | 			'admin-taxonomy-filter',
 14 | 			array( $this, 'render' )
 15 | 		);
 16 | 	}
 17 | 
 18 | 	public function render() {
 19 | 		?>
 20 | 		<div class="wrap">
 21 | 			<h1><?php esc_html_e( 'Admin Taxonomy Filter', 'admin-taxonomy-filter' ); ?></h1>
 22 | 			<div id="poststuff">
 23 | 				<div id="post-body" class="metabox-holder columns-2">
 24 | 					<form method="post" action="options.php" id="post-body-content">
 25 | 						<?php
 26 | 						settings_fields( 'admin_taxonomy_filter' );
 27 | 						do_settings_sections( 'admin-taxonomy-filter' );
 28 | 						submit_button();
 29 | 						?>
 30 | 					</form>
 31 | 					<div id="postbox-container-1" class="postbox-container">
 32 | 						<div class="postbox">
 33 | 							<h3 class="hndle">
 34 | 								<span><?php esc_html_e( 'Our WordPress Plugins', 'admin-taxonomy-filter' ) ?></span>
 35 | 							</h3>
 36 | 							<div class="inside">
 37 | 								<p><?php esc_html_e( 'Like this plugin? Check out our other WordPress plugins:', 'admin-taxonomy-filter' ) ?></p>
 38 | 								<p><a href="https://metabox.io" target="_blank">Meta Box</a> - <?php esc_html_e( 'Lightweight yet powerful WordPress custom fields plugin', 'admin-taxonomy-filter' ) ?></p>
 39 | 								<p><a href="https://wpslimseo.com" target="_blank">Slim SEO</a> - <?php esc_html_e( 'Automated & fast SEO plugin for WordPress', 'admin-taxonomy-filter' ) ?></p>
 40 | 								<p><a href="https://wordpress.org/plugins/falcon/" target="_blank">Falcon</a> - <?php esc_html_e( 'WordPress optimization and tweaks plugin', 'admin-taxonomy-filter' ) ?></p>
 41 | 							</div>
 42 | 						</div>
 43 | 					</div>
 44 | 				</div>
 45 | 			</div>
 46 | 		</div>
 47 | 		<?php
 48 | 	}
 49 | 
 50 | 	public function register_settings() {
 51 | 		add_settings_section(
 52 | 			'general',
 53 | 			'',
 54 | 			'__return_null',
 55 | 			'admin-taxonomy-filter'
 56 | 		);
 57 | 
 58 | 		add_settings_field(
 59 | 			'taxonomies',
 60 | 			__( 'Select Taxonomies To Filter', 'admin-taxonomy-filter' ),
 61 | 			array( $this, 'list_taxonomies' ),
 62 | 			'admin-taxonomy-filter',
 63 | 			'general'
 64 | 		);
 65 | 
 66 | 		register_setting( 'admin_taxonomy_filter', 'admin_taxonomy_filter' );
 67 | 	}
 68 | 
 69 | 	public function list_taxonomies() {
 70 | 		$option     = get_option( 'admin_taxonomy_filter' );
 71 | 		$post_types = get_post_types();
 72 | 
 73 | 		foreach ( $post_types as $post_type ) {
 74 | 
 75 | 			// Do not include menu item.
 76 | 			if ( 'nav_menu_item' === $post_type ) {
 77 | 				continue;
 78 | 			}
 79 | 
 80 | 			$post_type_object = get_post_type_object( $post_type );
 81 | 			$taxonomies       = get_object_taxonomies( $post_type, 'objects' );
 82 | 			if ( empty( $taxonomies ) ) {
 83 | 				continue;
 84 | 			}
 85 | 
 86 | 			$selected = isset( $option[ $post_type ] ) ? $option[ $post_type ] : array();
 87 | 
 88 | 			echo '<p><strong>', esc_html( $post_type_object->label ), '</strong></p>';
 89 | 			echo '<ul>';
 90 | 			foreach ( $taxonomies as $taxonomy ) {
 91 | 
 92 | 				// Do not include category for post.
 93 | 				if ( 'post' === $post_type && 'category' === $taxonomy->name ) {
 94 | 					continue;
 95 | 				}
 96 | 
 97 | 				printf(
 98 | 					'<li><label><input type="checkbox" name="admin_taxonomy_filter[%s][]" value="%s"%s> %s</label></li>',
 99 | 					esc_attr( $post_type ),
100 | 					esc_attr( $taxonomy->name ),
101 | 					checked( in_array( $taxonomy->name, $selected, true ), true, false ),
102 | 					esc_html( $taxonomy->label )
103 | 				);
104 | 			}
105 | 			echo '</ul>';
106 | 		}
107 | 	}
108 | }
109 | 


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/readme.txt:
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 1 | === Admin Taxonomy Filter ===
 2 | Contributors: elightup, rilwis
 3 | Donate link: https://paypal.me/anhtnt
 4 | Tags: taxonomy filter, post filter, admin, taxonomy, post list
 5 | Requires at least: 4.3
 6 | Tested up to: 6.5.3
 7 | Stable tag: 1.0.4
 8 | License: GPLv2 or later
 9 | 
10 | Filter posts or custom post types in the admin area by custom taxonomies.
11 | 
12 | == Description ==
13 | 
14 | **Admin Taxonomy Filter** helps you to filter posts or custom post types in the admin area (the post list table) by custom taxonomies. It's similar to filter posts by categories, which is supported by default.
15 | 
16 | The plugin supports filter by multiple taxonomies and has settings to let you choose which taxonomies are filterable.
17 | 
18 | The plugin is open source and hosted on [Github](https://github.com/rilwis/admin-taxonomy-filter/). If you have any problem or feedback, please open an issue.
19 | 
20 | ### You might also like
21 | 
22 | If you like this plugin, you might also like our other WordPress products:
23 | 
24 | - [Meta Box](https://metabox.io) - A powerful WordPress plugin for creating custom post types and custom fields.
25 | - [Slim SEO](https://wpslimseo.com) - A fast, lightweight and full-featured SEO plugin for WordPress with minimal configuration.
26 | - [Slim SEO Schema](https://wpslimseo.com/products/slim-seo-schema/) - An advanced, powerful and flexible plugin to add schemas to WordPress.
27 | - [Slim SEO Link Manager](https://wpslimseo.com/products/slim-seo-link-manager/) - Build internal link easier in WordPress with real-time reports.
28 | - [GretaThemes](https://gretathemes.com) - Free and premium WordPress themes that clean, simple and just work.
29 | - [Auto Listings](https://wpautolistings.com) - A car sale and dealership plugin for WordPress.
30 | 
31 | == Installation ==
32 | 
33 | - Go to **Plugins | Add New** and search for **Admin Taxonomy Filter**
34 | - Click **Install Now** button to install the plugin
35 | - After installing, click **Activate Plugin** to activate the plugin
36 | 
37 | After installing, go to **Settings | Taxonomy Filter** and select the taxonomies you want to filter for each custom post type.
38 | 
39 | Then go to the all posts screen to see the filter above the table.
40 | 
41 | == Frequently Asked Questions ==
42 | 
43 | == Screenshots ==
44 | 1. Settings
45 | 2. Filters in action
46 | 
47 | == Changelog ==
48 | 
49 | = 1.0.4 =
50 | - Fix deprecated notice in PHP 8.1
51 | 
52 | = 1.0.3 =
53 | - Update compatibility with the latest version of WordPress
54 | 
55 | = 1.0.2 =
56 | - Update compatibility tags
57 | 
58 | = 1.0.1 =
59 | - Update compatibility with the latest version of WordPress
60 | 
61 | = 1.0 =
62 | - First version
63 | 
64 | == Upgrade Notice ==
65 | 


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