WordPress plugin. Removes selected old slugs/permalinks from database.

remove-old-slugs-redirects.php

<?php
/**
 * Remove old slugs redirects.
 *
 * Removes selected old slugs/permalinks from database.
 *
 * @package   WordPress_Remove_Old_Slugs_Redirects
 * @author    Sébastien Méric <sebastien.meric@gmail.com>
 * @credit    Algoritmika Ltd. <http://www.algoritmika.com>
 * @license   GPL-2.0+
 * @link      http://www.sebastien-meric.com/
 * @copyright 2015 Sébastien Méric
 *
 * @wordpress-plugin
 * Plugin Name: Remove old slugs redirects.
 * Plugin URI:  https://gist.github.com/smeric/4a90e341be8c1a9f4d75
 * Description: Removes selected old slugs/permalinks from database. This plugin is a revamp of <a href="https://wordpress.org/plugins/remove-old-slugspermalinks/" target="_blank">WordPress Remove Old Slugs</a> from <a href="http://www.algoritmika.com" target="_blank">Algoritmika Ltd.</a>.
 * Version:     0.2.0
 * Author:      Sébastien Méric <sebastien.meric@gmail.com>
 * Author URI:  http://www.sebastien-meric.com/
 * Text Domain: remove-old-slugs-redirects
 * License:     GPL-2.0+
 * License URI: http://www.gnu.org/licenses/gpl-2.0.txt
 */

// If this file is called directly, abort.
if ( ! defined( 'WPINC' ) ) {
	die;
}

/**
 * Plugin class.
 */
if ( ! class_exists( 'WordPress_Remove_Old_Slugs_Redirects' ) ) {
	class WordPress_Remove_Old_Slugs_Redirects{

		/**
		 * Slug of the plugin.
		 *
		 * @since    0.1.0
		 * @access   protected
		 * @var      string
		 */
		protected $plugin_slug = 'remove-old-slugs-redirects';

		/**
		 * Initialize the plugin by adding an administration page and menu item.
		 *
		 * @since     0.1.0
		 */

		public function __construct(){
			// Add the options page and menu item.
			add_action( 'admin_menu', array( $this, 'add_admin_page' ) );
		}

		/**
		 * Register the administration menu for this plugin into the WordPress Dashboard menu.
		 *
		 * @since    0.1.0
		 */
		public function add_admin_page(){
			add_submenu_page(
				'tools.php',
				__( 'Remove old slugs redirections', $this->plugin_slug ),
				__( 'Remove old slugs redirects', $this->plugin_slug ),
				'manage_options',
				$this->plugin_slug,
				array( $this, 'create_admin_page' )
			);
		}

		/**
		 * Render the administration page for this plugin.
		 *
		 * @since    0.1.0
		 */
		public function create_admin_page(){
			global $wpdb;

?>
			<div class="wrap">
<?php 
			if ( isset( $_POST['remove_old_slugs'] ) ) {
				if ( ! wp_verify_nonce( $_POST['_wpnonce'], 'remove_old_slugs' ) ) {
					wp_die( __( 'Failed security check', $this->plugin_slug ) );
				}

				$meta_id = array();

				foreach ( $_POST['meta_id'] as $id ) {
					$meta_id[] = ( int ) $id;
				}

				$query = $wpdb->prepare("
					DELETE FROM {$wpdb->prefix}postmeta
					WHERE meta_id in (" . implode( ',', $meta_id ) . ")
				");
				$results = $wpdb->query( $query );

				if ( $results ) {
					$slugs = _n( 'slug', 'slugs', $results, $this->plugin_slug );
?>
					<div id="setting-error-settings_updated" class="updated settings-error">
						<p><?php printf( __( '<strong>Removing old %1$s from database finished ! %2$s old %1$s deleted.</strong>', $this->plugin_slug ), $slugs, $results ) ?></p>
					</div>
<?php
				}
				else {
?>
					<div id="setting-error-settings_updated" class="error settings-error">
						<p><?php _e( '<strong>No slug removed.</strong>', $this->plugin_slug ) ?></p>
					</div>
<?php
				}
			}

			$wp_old_slugs = $wpdb->get_results("
				SELECT meta_id, post_id, meta_value
				FROM {$wpdb->prefix}postmeta
				WHERE meta_key = '_wp_old_slug'
			");
			$count = count( $wp_old_slugs );
?>
			<h2><?php echo esc_html( get_admin_page_title() ) ?></h2>
			<p><?php _e( 'This tool removes old slugs/permalinks from database. Select the one(s) you want to remove then press Remove button to proceed.', $this->plugin_slug ) ?></p>
<?php 
			if ( $count > 0 ) {
				$post_id = 0;
?>
				<form method="post" action="">
					<p><?php printf( __( '<strong>%s</strong> old slug(s) found.', $this->plugin_slug ), $count ) ?></p>
					<table class="wp-list-table widefat fixed posts">
						<thead>
							<tr>
								<th scope="col" id="cb" class="manage-column column-cb check-column"><label class="screen-reader-text" for="cb-select-all-1"><?php _e( 'Select all', $this->plugin_slug ) ?></label><input id="cb-select-all-1" type="checkbox"></th>
								<th scope="col" id="title" class="manage-column column-title"><?php _e( 'Post title', $this->plugin_slug ) ?></th>
								<th scope="col" id="slug" class="manage-column column-title"><?php _e( 'Active slug', $this->plugin_slug ) ?></th>
								<th scope="col" id="old-slug" class="manage-column column-title"><?php _e( 'Old slug', $this->plugin_slug ) ?></th>
							</tr>
						</thead>
						<tfoot>
							<tr>
								<th scope="col" id="cb" class="manage-column column-cb check-column"><label class="screen-reader-text" for="cb-select-all-1"><?php _e( 'Select all', $this->plugin_slug ) ?></label><input id="cb-select-all-1" type="checkbox"></th>
								<th scope="col" id="title" class="manage-column column-title"><?php _e( 'Post title', $this->plugin_slug ) ?></th>
								<th scope="col" id="slug" class="manage-column column-title"><?php _e( 'Active slug', $this->plugin_slug ) ?></th>
								<th scope="col" id="old-slug" class="manage-column column-title"><?php _e( 'Old slug', $this->plugin_slug ) ?></th>
							</tr>
						</tfoot>
						<tbody>
<?php
				usort( $wp_old_slugs, function( $a, $b ){
					return $a->post_id - $b->post_id;
				});

				$i = 0;
				foreach ( $wp_old_slugs as $wp_old_slug ) {
					$title = get_the_title( $wp_old_slug->post_id );
?>
							<tr class="<?php echo $i%2 ? 'alternate' : '' ?>">
								<th scope="row" class="check-column">
									<label class="screen-reader-text" for="cb-select-<?php echo $wp_old_slug->meta_id ?>"><?php printf( __( 'Select %s', $this->plugin_slug ), $wp_old_slug->meta_value ) ?></label>
									<input id="cb-select-<?php echo $wp_old_slug->meta_id ?>" type="checkbox" name="meta_id[]" value="<?php echo $wp_old_slug->meta_id ?>"></div>
								</th>
								<td class="post-title page-title column-title row-title">
									<?php echo $title ? $title : __( '[untitled]', $this->plugin_slug ) ?>
								</td>
								<td class="post-title page-title column-title row-title">
									<label for="cb-select-<?php echo $wp_old_slug->meta_id ?>"><code><?php echo $this->get_the_slug( $wp_old_slug->post_id ) ?></code></label>
								</td class="post-title page-title column-title row-title">
								<td>
									<label for="cb-select-<?php echo $wp_old_slug->meta_id ?>"><code><?php echo $wp_old_slug->meta_value ?></code></label>
								</td>
							</tr>
<?php
					$i++;
				}
?>
						</tbody>
					</table>
					<?php wp_nonce_field( 'remove_old_slugs' ) ?>
					<div class="tablenav bottom">
						<input type="submit" name="remove_old_slugs" value="Remove" class="button button-primary" />
					</div>
				</form>
<?php
			}
			else {
?>
				<p><?php _e( 'No old slugs found in database.', $this->plugin_slug ) ?></p>
<?php
			}
		}

		/**
		 * Get the slug of a post type by id.
		 *
		 * @since    0.1.0
		 * @author   Tom Barrett (@TCBarrett)
		 * @see      http://www.tcbarrett.com/2013/05/wordpress-how-to-get-the-slug-of-your-post-or-page/
		 */
		public function get_the_slug( $id = null ){
			if ( empty( $id ) ) {
				global $post;
				if ( empty( $post ) ) {
					// No global $post var available.
					return '';
				}
				$id = $post->ID;
			}

			$slug = basename( get_permalink( $id ) );
			return $slug;
		}

		/**
		 * Display the post type slug.
		 *
		 * @since    0.1.0
		 * @author   Tom Barrett (@TCBarrett)
		 * @see      http://www.tcbarrett.com/2013/05/wordpress-how-to-get-the-slug-of-your-post-or-page/
		 */
		public function the_slug( $id = null ){
			echo apply_filters( 'the_slug', $this->get_the_slug( $id ) );
		}
	}
}

$WPROSR = new WordPress_Remove_Old_Slugs_Redirects();