plugin: disable comments 1.6

wp-content/plugins/disable-comments/disable-comments.php

+<?php
+/*
+Plugin Name: Disable Comments
+Plugin URI: https://wordpress.org/plugins/disable-comments/
+Description: Allows administrators to globally disable comments on their site. Comments can be disabled according to post type.
+Version: 1.6
+Author: Samir Shah
+Author URI: http://www.rayofsolaris.net/
+License: GPL2
+Text Domain: disable-comments
+Domain Path: /languages/
+*/
+
+if( !defined( 'ABSPATH' ) )
+	exit;
+
+class Disable_Comments {
+	const DB_VERSION = 6;
+	private static $instance = null;
+	private $options;
+	private $networkactive;
+	private $modified_types = array();
+
+	public static function get_instance() {
+		if ( is_null( self::$instance ) ) {
+			self::$instance = new self;
+		}
+		return self::$instance;
+	}
+
+	private function __construct() {
+		// are we network activated?
+		$this->networkactive = ( is_multisite() && array_key_exists( plugin_basename( __FILE__ ), (array) get_site_option( 'active_sitewide_plugins' ) ) );
+
+		// Load options
+		if( $this->networkactive ) {
+			$this->options = get_site_option( 'disable_comments_options', array() );
+		}
+		else {
+			$this->options = get_option( 'disable_comments_options', array() );
+		}
+
+		// If it looks like first run, check compat
+		if( empty( $this->options ) ) {
+			$this->check_compatibility();
+		}
+
+		// Upgrade DB if necessary
+		$this->check_db_upgrades();
+
+		$this->init_filters();
+	}
+
+	private function check_compatibility() {
+		if ( version_compare( $GLOBALS['wp_version'], '3.8', '<' ) ) {
+			require_once( ABSPATH . 'wp-admin/includes/plugin.php' );
+			deactivate_plugins( __FILE__ );
+			if ( isset( $_GET['action'] ) && ( $_GET['action'] == 'activate' || $_GET['action'] == 'error_scrape' ) ) {
+				exit( sprintf( __( 'Disable Comments requires WordPress version %s or greater.', 'disable-comments' ), '3.8' ) );
+			}
+		}
+	}
+
+	private function check_db_upgrades() {
+		$old_ver = isset( $this->options['db_version'] ) ? $this->options['db_version'] : 0;
+		if( $old_ver < self::DB_VERSION ) {
+			if( $old_ver < 2 ) {
+				// upgrade options from version 0.2.1 or earlier to 0.3
+				$this->options['disabled_post_types'] = get_option( 'disable_comments_post_types', array() );
+				delete_option( 'disable_comments_post_types' );
+			}
+			if( $old_ver < 5 ) {
+				// simple is beautiful - remove multiple settings in favour of one
+				$this->options['remove_everywhere'] = isset( $this->options['remove_admin_menu_comments'] ) ? $this->options['remove_admin_menu_comments'] : false;
+				foreach( array( 'remove_admin_menu_comments', 'remove_admin_bar_comments', 'remove_recent_comments', 'remove_discussion', 'remove_rc_widget' ) as $v )
+					unset( $this->options[$v] );
+			}
+
+			foreach( array( 'remove_everywhere', 'permanent', 'extra_post_types' ) as $v ) {
+				if( !isset( $this->options[$v] ) ) {
+					$this->options[$v] = false;
+				}
+			}
+
+			$this->options['db_version'] = self::DB_VERSION;
+			$this->update_options();
+		}
+	}
+
+	private function update_options() {
+		if( $this->networkactive ) {
+			update_site_option( 'disable_comments_options', $this->options );
+		}
+		else {
+			update_option( 'disable_comments_options', $this->options );
+		}
+	}
+
+	/*
+	 * Get an array of disabled post type.
+	 */
+	private function get_disabled_post_types() {
+		$types = $this->options['disabled_post_types'];
+		// Not all extra_post_types might be registered on this particular site
+		if( $this->networkactive ) {
+			foreach( (array) $this->options['extra_post_types'] as $extra ) {
+				if( post_type_exists( $extra ) ) {
+					$types[] = $extra;
+				}
+			}
+		}
+		return $types;
+	}
+
+	/*
+	 * Check whether comments have been disabled on a given post type.
+	 */
+	private function is_post_type_disabled( $type ) {
+		return in_array( $type, $this->get_disabled_post_types() );
+	}
+
+	private function init_filters() {
+		// These need to happen now
+		if( $this->options['remove_everywhere'] ) {
+			add_action( 'widgets_init', array( $this, 'disable_rc_widget' ) );
+			add_filter( 'wp_headers', array( $this, 'filter_wp_headers' ) );
+			add_action( 'template_redirect', array( $this, 'filter_query' ), 9 );	// before redirect_canonical
+
+			// Admin bar filtering has to happen here since WP 3.6
+			add_action( 'template_redirect', array( $this, 'filter_admin_bar' ) );
+			add_action( 'admin_init', array( $this, 'filter_admin_bar' ) );
+		}
+
+		// These can happen later
+		add_action( 'plugins_loaded', array( $this, 'register_text_domain' ) );
+		add_action( 'wp_loaded', array( $this, 'init_wploaded_filters' ) );
+	}
+
+	public function register_text_domain() {
+		load_plugin_textdomain( 'disable-comments', false, dirname( plugin_basename( __FILE__ ) ) .  '/languages' );
+	}
+
+	public function init_wploaded_filters(){
+		$disabled_post_types = $this->get_disabled_post_types();
+		if( !empty( $disabled_post_types ) ) {
+			foreach( $disabled_post_types as $type ) {
+				// we need to know what native support was for later
+				if( post_type_supports( $type, 'comments' ) ) {
+					$this->modified_types[] = $type;
+					remove_post_type_support( $type, 'comments' );
+					remove_post_type_support( $type, 'trackbacks' );
+				}
+			}
+			add_filter( 'comments_array', array( $this, 'filter_existing_comments' ), 20, 2 );
+			add_filter( 'comments_open', array( $this, 'filter_comment_status' ), 20, 2 );
+			add_filter( 'pings_open', array( $this, 'filter_comment_status' ), 20, 2 );
+		}
+		elseif( is_admin() ) {
+			add_action( 'all_admin_notices', array( $this, 'setup_notice' ) );
+		}
+
+		// Filters for the admin only
+		if( is_admin() ) {
+			if( $this->networkactive ) {
+				add_action( 'network_admin_menu', array( $this, 'settings_menu' ) );
+				add_action( 'network_admin_menu', array( $this, 'tools_menu' ) );
+				add_filter( 'network_admin_plugin_action_links', array( $this, 'plugin_actions_links'), 10, 2 );
+			}
+			else {
+				add_action( 'admin_menu', array( $this, 'settings_menu' ) );
+				add_action( 'admin_menu', array( $this, 'tools_menu' ) );
+				add_filter( 'plugin_action_links', array( $this, 'plugin_actions_links'), 10, 2 );
+				if( is_multisite() )	// We're on a multisite setup, but the plugin isn't network activated.
+					register_deactivation_hook( __FILE__, array( $this, 'single_site_deactivate' ) );
+			}
+
+			add_action( 'admin_print_footer_scripts', array( $this, 'discussion_notice' ) );
+			add_filter( 'plugin_row_meta', array( $this, 'set_plugin_meta' ), 10, 2 );
+
+			// if only certain types are disabled, remember the original post status
+			if( !( $this->persistent_mode_allowed() && $this->options['permanent'] ) && !$this->options['remove_everywhere'] ) {
+				add_action( 'edit_form_advanced', array( $this, 'edit_form_inputs' ) );
+				add_action( 'edit_page_form', array( $this, 'edit_form_inputs' ) );
+			}
+
+			if( $this->options['remove_everywhere'] ) {
+				add_action( 'admin_menu', array( $this, 'filter_admin_menu' ), 9999 );	// do this as late as possible
+				add_action( 'admin_print_footer_scripts-index.php', array( $this, 'dashboard_js' ) );
+				add_action( 'wp_dashboard_setup', array( $this, 'filter_dashboard' ) );
+				add_filter( 'pre_option_default_pingback_flag', '__return_zero' );
+			}
+		}
+		// Filters for front end only
+		else {
+			add_action( 'template_redirect', array( $this, 'check_comment_template' ) );
+
+			if( $this->options['remove_everywhere'] ) {
+				add_filter( 'feed_links_show_comments_feed', '__return_false' );
+				add_action( 'wp_footer', array( $this, 'hide_meta_widget_link' ), 100 );
+			}
+		}
+	}
+
+	/*
+	 * Replace the theme's comment template with a blank one.
+	 * To prevent this, define DISABLE_COMMENTS_REMOVE_COMMENTS_TEMPLATE
+	 * and set it to True
+	 */
+	public function check_comment_template() {
+		if( is_singular() && ( $this->options['remove_everywhere'] || $this->is_post_type_disabled( get_post_type() ) ) ) {
+			if( !defined( 'DISABLE_COMMENTS_REMOVE_COMMENTS_TEMPLATE' ) || DISABLE_COMMENTS_REMOVE_COMMENTS_TEMPLATE == true ) {
+				// Kill the comments template.
+				add_filter( 'comments_template', array( $this, 'dummy_comments_template' ), 20 );
+			}
+			// Remove comment-reply script for themes that include it indiscriminately
+			wp_deregister_script( 'comment-reply' );
+			// feed_links_extra inserts a comments RSS link
+			remove_action( 'wp_head', 'feed_links_extra', 3 );
+		}
+	}
+
+	public function dummy_comments_template() {
+		return dirname( __FILE__ ) . '/includes/comments-template.php';
+	}
+
+
+	/*
+	 * Remove the X-Pingback HTTP header
+	 */
+	public function filter_wp_headers( $headers ) {
+		unset( $headers['X-Pingback'] );
+		return $headers;
+	}
+
+	/*
+	 * Issue a 403 for all comment feed requests.
+	 */
+	public function filter_query() {
+		if( is_comment_feed() ) {
+			wp_die( __( 'Comments are closed.' ), '', array( 'response' => 403 ) );
+		}
+	}
+
+	/*
+	 * Remove comment links from the admin bar.
+	 */
+	public function filter_admin_bar() {
+		if( is_admin_bar_showing() ) {
+			// Remove comments links from admin bar
+			remove_action( 'admin_bar_menu', 'wp_admin_bar_comments_menu', 60 );
+			if( is_multisite() ) {
+				add_action( 'admin_bar_menu', array( $this, 'remove_network_comment_links' ), 500 );
+			}
+		}
+	}
+
+	/*
+	 * Remove comment links from the admin bar in a multisite network.
+	 */
+	public function remove_network_comment_links( $wp_admin_bar ) {
+		if( $this->networkactive && is_user_logged_in() ) {
+			foreach( (array) $wp_admin_bar->user->blogs as $blog ) {
+				$wp_admin_bar->remove_menu( 'blog-' . $blog->userblog_id . '-c' );
+			}
+		}
+		else {
+			// We have no way to know whether the plugin is active on other sites, so only remove this one
+			$wp_admin_bar->remove_menu( 'blog-' . get_current_blog_id() . '-c' );
+		}
+	}
+
+	public function edit_form_inputs() {
+		global $post;
+		// Without a dicussion meta box, comment_status will be set to closed on new/updated posts
+		if( in_array( $post->post_type, $this->modified_types ) ) {
+			echo '<input type="hidden" name="comment_status" value="' . $post->comment_status . '" /><input type="hidden" name="ping_status" value="' . $post->ping_status . '" />';
+		}
+	}
+
+	public function discussion_notice(){
+		$disabled_post_types = $this->get_disabled_post_types();
+		if( get_current_screen()->id == 'options-discussion' && !empty( $disabled_post_types ) ) {
+			$names = array();
+			foreach( $disabled_post_types as $type )
+				$names[$type] = get_post_type_object( $type )->labels->name;
+?>
+<script>
+jQuery(document).ready(function($){
+	$(".wrap h2").first().after( <?php echo json_encode( '<div style="color: #900"><p>' . sprintf( __( 'Note: The <em>Disable Comments</em> plugin is currently active, and comments are completely disabled on: %s. Many of the settings below will not be applicable for those post types.', 'disable-comments' ), implode( __( ', ' ), $names ) ) . '</p></div>' );?> );
+});
+</script>
+<?php
+		}
+	}
+
+	/**
+	 * Return context-aware settings page URL
+	 */
+	private function settings_page_url() {
+		$base =  $this->networkactive ? network_admin_url( 'settings.php' ) : admin_url( 'options-general.php' );
+		return add_query_arg( 'page', 'disable_comments_settings', $base );
+	}
+
+	/**
+	 * Return context-aware tools page URL
+	 */
+	private function tools_page_url() {
+		$base =  $this->networkactive ? network_admin_url( 'settings.php' ) : admin_url( 'tools.php' );
+		return add_query_arg( 'page', 'disable_comments_tools', $base );
+	}
+
+	public function setup_notice(){
+		if( strpos( get_current_screen()->id, 'settings_page_disable_comments_settings' ) === 0 )
+			return;
+		$hascaps = $this->networkactive ? is_network_admin() && current_user_can( 'manage_network_plugins' ) : current_user_can( 'manage_options' );
+		if( $hascaps ) {
+			echo '<div class="updated fade"><p>' . sprintf( __( 'The <em>Disable Comments</em> plugin is active, but isn\'t configured to do anything yet. Visit the <a href="%s">configuration page</a> to choose which post types to disable comments on.', 'disable-comments'), esc_attr( $this->settings_page_url() ) ) . '</p></div>';
+		}
+	}
+
+	public function filter_admin_menu(){
+		global $pagenow;
+
+		if ( $pagenow == 'comment.php' || $pagenow == 'edit-comments.php' || $pagenow == 'options-discussion.php' )
+			wp_die( __( 'Comments are closed.' ), '', array( 'response' => 403 ) );
+
+		remove_menu_page( 'edit-comments.php' );
+		remove_submenu_page( 'options-general.php', 'options-discussion.php' );
+	}
+
+	public function filter_dashboard(){
+		remove_meta_box( 'dashboard_recent_comments', 'dashboard', 'normal' );
+	}
+
+	public function dashboard_js(){
+		echo '<script>
+		jQuery(function($){
+			$("#dashboard_right_now .comment-count, #latest-comments").hide();
+		 	$("#welcome-panel .welcome-comments").parent().hide();
+		});
+		</script>';
+	}
+
+	public function hide_meta_widget_link(){
+		if ( is_active_widget( false, false, 'meta', true ) && wp_script_is( 'jquery', 'enqueued' ) ) {
+			echo '<script> jQuery(function($){ $(".widget_meta a[href=\'' . esc_url( get_bloginfo( 'comments_rss2_url' ) ) . '\']").parent().remove(); }); </script>';
+		}
+	}
+
+	public function filter_existing_comments($comments, $post_id) {
+		$post = get_post( $post_id );
+		return ( $this->options['remove_everywhere'] || $this->is_post_type_disabled( $post->post_type ) ) ? array() : $comments;
+	}
+
+	public function filter_comment_status( $open, $post_id ) {
+		$post = get_post( $post_id );
+		return ( $this->options['remove_everywhere'] || $this->is_post_type_disabled( $post->post_type ) ) ? false : $open;
+	}
+
+	public function disable_rc_widget() {
+		unregister_widget( 'WP_Widget_Recent_Comments' );
+	}
+
+	public function set_plugin_meta( $links, $file ) {
+		static $plugin;
+		$plugin = plugin_basename( __FILE__ );
+		if ( $file == $plugin ) {
+			$links[] = '<a href="https://github.com/solarissmoke/disable-comments">GitHub</a>';
+		}
+		return $links;
+	}
+
+	/**
+	 * Add links to Settings page
+	*/
+	public function plugin_actions_links( $links, $file ) {
+		static $plugin;
+		$plugin = plugin_basename( __FILE__ );
+		if( $file == $plugin && current_user_can('manage_options') ) {
+			array_unshift(
+				$links,
+				sprintf( '<a href="%s">%s</a>', esc_attr( $this->settings_page_url() ), __( 'Settings' ) ),
+				sprintf( '<a href="%s">%s</a>', esc_attr( $this->tools_page_url() ), __( 'Tools' ) )
+			);
+		}
+
+		return $links;
+	}
+
+	public function settings_menu() {
+		$title = __( 'Disable Comments', 'disable-comments' );
+		if( $this->networkactive )
+			add_submenu_page( 'settings.php', $title, $title, 'manage_network_plugins', 'disable_comments_settings', array( $this, 'settings_page' ) );
+		else
+			add_submenu_page( 'options-general.php', $title, $title, 'manage_options', 'disable_comments_settings', array( $this, 'settings_page' ) );
+	}
+
+	public function settings_page() {
+		include dirname( __FILE__ ) . '/includes/settings-page.php';
+	}
+
+	public function tools_menu() {
+		$title = __( 'Delete Comments', 'disable-comments' );
+		if( $this->networkactive )
+			add_submenu_page( 'settings.php', $title, $title, 'manage_network_plugins', 'disable_comments_tools', array( $this, 'tools_page' ) );
+		else
+			add_submenu_page( 'tools.php', $title, $title, 'manage_options', 'disable_comments_tools', array( $this, 'tools_page' ) );
+	}
+
+	public function tools_page() {
+		include dirname( __FILE__ ) . '/includes/tools-page.php';
+	}
+
+	private function enter_permanent_mode() {
+		$types = $this->get_disabled_post_types();
+		if( empty( $types ) )
+			return;
+
+		global $wpdb;
+
+		if( $this->networkactive ) {
+			// NOTE: this can be slow on large networks!
+			$blogs = $wpdb->get_col( $wpdb->prepare( "SELECT blog_id FROM $wpdb->blogs WHERE site_id = %d AND public = '1' AND archived = '0' AND deleted = '0'", $wpdb->siteid ) );
+
+			foreach ( $blogs as $id ) {
+				switch_to_blog( $id );
+				$this->close_comments_in_db( $types );
+				restore_current_blog();
+			}
+		}
+		else {
+			$this->close_comments_in_db( $types );
+		}
+	}
+
+	private function close_comments_in_db( $types ){
+		global $wpdb;
+		$bits = implode( ', ', array_pad( array(), count( $types ), '%s' ) );
+		$wpdb->query( $wpdb->prepare( "UPDATE `$wpdb->posts` SET `comment_status` = 'closed', ping_status = 'closed' WHERE `post_type` IN ( $bits )", $types ) );
+	}
+
+	private function persistent_mode_allowed() {
+		if( defined( 'DISABLE_COMMENTS_ALLOW_PERSISTENT_MODE' ) && DISABLE_COMMENTS_ALLOW_PERSISTENT_MODE == false ) {
+			return false;
+		}
+		// The filter below is deprecated and will be removed in future versions. Use the define instead.
+		return apply_filters( 'disable_comments_allow_persistent_mode', true );
+	}
+
+	public function single_site_deactivate() {
+		// for single sites, delete the options upon deactivation, not uninstall
+		delete_option( 'disable_comments_options' );
+	}
+}
+
+Disable_Comments::get_instance();

wp-content/plugins/disable-comments/includes/comments-template.php

+<?php
+/* Dummy comments template file.
+ * This replaces the theme's comment template when comments are disabled everywhere
+ */
\ No newline at end of file

wp-content/plugins/disable-comments/includes/settings-page.php

+<?php
+if( !defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+$typeargs = array( 'public' => true );
+if( $this->networkactive ) {
+	$typeargs['_builtin'] = true;	// stick to known types for network
+}
+$types = get_post_types( $typeargs, 'objects' );
+foreach( array_keys( $types ) as $type ) {
+	if( ! in_array( $type, $this->modified_types ) && ! post_type_supports( $type, 'comments' ) )	// the type doesn't support comments anyway
+		unset( $types[$type] );
+}
+
+$persistent_allowed = $this->persistent_mode_allowed();
+
+if ( isset( $_POST['submit'] ) ) {
+	check_admin_referer( 'disable-comments-admin' );
+	$this->options['remove_everywhere'] = ( $_POST['mode'] == 'remove_everywhere' );
+
+	if( $this->options['remove_everywhere'] )
+		$disabled_post_types = array_keys( $types );
+	else
+		$disabled_post_types =  empty( $_POST['disabled_types'] ) ? array() : (array) $_POST['disabled_types'];
+
+	$disabled_post_types = array_intersect( $disabled_post_types, array_keys( $types ) );
+
+	// entering permanent mode, or post types have changed
+	if( $persistent_allowed && !empty( $_POST['permanent'] ) && ( !$this->options['permanent'] || $disabled_post_types != $this->options['disabled_post_types'] ) )
+		$this->enter_permanent_mode();
+
+	$this->options['disabled_post_types'] = $disabled_post_types;
+	$this->options['permanent'] = $persistent_allowed && isset( $_POST['permanent'] );
+
+	// Extra custom post types
+	if( $this->networkactive && !empty( $_POST['extra_post_types'] ) ) {
+		$extra_post_types = array_filter( array_map( 'sanitize_key', explode( ',', $_POST['extra_post_types'] ) ) );
+		$this->options['extra_post_types'] = array_diff( $extra_post_types, array_keys( $types ) );	// Make sure we don't double up builtins
+	}
+
+	$this->update_options();
+	$cache_message = WP_CACHE ? ' <strong>' . __( 'If a caching/performance plugin is active, please invalidate its cache to ensure that changes are reflected immediately.' ) . '</strong>' : '';
+	echo '<div id="message" class="updated"><p>' . __( 'Options updated. Changes to the Admin Menu and Admin Bar will not appear until you leave or reload this page.', 'disable-comments' ) . $cache_message . '</p></div>';
+}
+?>
+<style> .indent {padding-left: 2em} </style>
+<div class="wrap">
+<h1><?php _e( 'Disable Comments', 'disable-comments') ?></h1>
+<?php
+if( $this->networkactive )
+	echo '<div class="updated"><p>' . __( '<em>Disable Comments</em> is Network Activated. The settings below will affect <strong>all sites</strong> in this network.', 'disable-comments') . '</p></div>';
+if( WP_CACHE )
+	echo '<div class="updated"><p>' . __( "It seems that a caching/performance plugin is active on this site. Please manually invalidate that plugin's cache after making any changes to the settings below.", 'disable-comments') . '</p></div>';
+?>
+<form action="" method="post" id="disable-comments">
+<ul>
+<li><label for="remove_everywhere"><input type="radio" id="remove_everywhere" name="mode" value="remove_everywhere" <?php checked( $this->options['remove_everywhere'] );?> /> <strong><?php _e( 'Everywhere', 'disable-comments') ?></strong>: <?php _e( 'Disable all comment-related controls and settings in WordPress.', 'disable-comments') ?></label>
+	<p class="indent"><?php printf( __( '%s: This option is global and will affect your entire site. Use it only if you want to disable comments <em>everywhere</em>. A complete description of what this option does is <a href="%s" target="_blank">available here</a>.', 'disable-comments' ), '<strong style="color: #900">' . __('Warning', 'disable-comments') . '</strong>', 'https://wordpress.org/plugins/disable-comments/other_notes/' ); ?></p>
+</li>
+<li><label for="selected_types"><input type="radio" id="selected_types" name="mode" value="selected_types" <?php checked( ! $this->options['remove_everywhere'] );?> /> <strong><?php _e( 'On certain post types', 'disable-comments') ?></strong>:</label>
+	<p></p>
+	<ul class="indent" id="listoftypes">
+		<?php foreach( $types as $k => $v ) echo "<li><label for='post-type-$k'><input type='checkbox' name='disabled_types[]' value='$k' ". checked( in_array( $k, $this->options['disabled_post_types'] ), true, false ) ." id='post-type-$k'> {$v->labels->name}</label></li>";?>
+	</ul>
+	<?php if( $this->networkactive ) :?>
+	<p class="indent" id="extratypes"><?php _e( 'Only the built-in post types appear above. If you want to disable comments on other custom post types on the entire network, you can supply a comma-separated list of post types below (use the slug that identifies the post type).', 'disable-comments' ); ?>
+	<br /><label><?php _e( 'Custom post types:', 'disable-comments' ); ?> <input type="text" name="extra_post_types" size="30" value="<?php echo implode( ', ', (array) $this->options['extra_post_types'] ); ?>" /></label></p>
+	<?php endif; ?>
+	<p class="indent"><?php _e( 'Disabling comments will also disable trackbacks and pingbacks. All comment-related fields will also be hidden from the edit/quick-edit screens of the affected posts. These settings cannot be overridden for individual posts.', 'disable-comments') ?></p>
+</li>
+</ul>
+
+<?php if( $persistent_allowed && $this->options['permanent'] ): ?>
+<h2><?php _e( 'Other options', 'disable-comments') ?></h2>
+<ul>
+	<li>
+	<?php
+	echo '<label for="permanent"><input type="checkbox" name="permanent" id="permanent" '. checked( $this->options['permanent'], true, false ) . '> <strong>' . __( 'Use persistent mode', 'disable-comments') . '</strong></label>';
+	echo '<p class="indent">' . sprintf( __( '%s: <strong>This will make persistent changes to your database &mdash; comments will remain closed even if you later disable the plugin!</strong> You should not use it if you only want to disable comments temporarily. Please <a href="%s" target="_blank">read the FAQ</a> before selecting this option.', 'disable-comments'), '<strong style="color: #900">' . __('Warning', 'disable-comments') . '</strong>', 'https://wordpress.org/plugins/disable-comments/faq/' ) . '</p>';
+	if( $this->networkactive )
+		echo '<p class="indent">' . sprintf( __( '%s: Entering persistent mode on large multi-site networks requires a large number of database queries and can take a while. Use with caution!', 'disable-comments'), '<strong style="color: #900">' . __('Warning', 'disable-comments') . '</strong>' ) . '</p>';
+	?>
+	</li>
+</ul>
+<?php endif; ?>
+
+<?php wp_nonce_field( 'disable-comments-admin' ); ?>
+<p class="submit"><input class="button-primary" type="submit" name="submit" value="<?php _e( 'Save Changes', 'disable-comments') ?>"></p>
+</form>
+</div>
+<script>
+jQuery(document).ready(function($){
+	function disable_comments_uihelper(){
+		var indiv_bits = $("#listoftypes, #extratypes");
+		if( $("#remove_everywhere").is(":checked") )
+			indiv_bits.css("color", "#888").find(":input").attr("disabled", true );
+		else
+			indiv_bits.css("color", "#000").find(":input").attr("disabled", false );
+	}
+
+	$("#disable-comments :input").change(function(){
+		$("#message").slideUp();
+		disable_comments_uihelper();
+	});
+
+	disable_comments_uihelper();
+
+	$("#permanent").change( function() {
+		if( $(this).is(":checked") && ! confirm(<?php echo json_encode( sprintf( __( '%s: Selecting this option will make persistent changes to your database. Are you sure you want to enable it?', 'disable-comments'), __( 'Warning', 'disable-comments' ) ) );?>) )
+			$(this).attr("checked", false );
+	});
+});
+</script>

wp-content/plugins/disable-comments/includes/tools-page.php

+<?php
+if( !defined( 'ABSPATH' ) ) {
+	exit;
+}
+?>
+<div class="wrap">
+<h1><?php _e( 'Delete Comments', 'disable-comments') ?></h1>
+<?php
+
+global $wpdb;
+$comments_count = $wpdb->get_var("SELECT count(comment_id) from $wpdb->comments");
+if ( $comments_count <= 0 ) { ?>