JezK

Edit File: banned-plugins.php

<?php

if ( ! defined( 'WPINC' ) || ! defined( 'ABSPATH' ) ) {
	die;
}

require_once ABSPATH . 'wp-admin/includes/plugin.php';

class RBBannedPluginsPlugin {
	const NOTICE_TRANSIENT = 'rb_banned_plugins_deactivated';

/**
	 * Plugins that must not run on a Box, mapped to the reason shown to the user.
	 */
	protected $banned_plugins = array(
		'varnish-http-purge/varnish-http-purge.php' => 'Cache purging is already handled by Raidboxes on this Box.',
	);

public function __construct() {
		// LiteSpeed Cache is only banned on Boxes where the platform ships and
		// configures it as an MU-plugin (RB_LITESPEED_CACHE_PLUGIN), because
		// loading both copies at once is a fatal class redeclaration. On all
		// other Boxes the plugin from the WordPress repo may be used normally.
		if ( defined( 'RB_LITESPEED_CACHE_PLUGIN' ) && RB_LITESPEED_CACHE_PLUGIN ) {
			$this->banned_plugins['litespeed-cache/litespeed-cache.php'] = 'LiteSpeed Cache is already provided and configured by Raidboxes on this Box, so it cannot be used as a separate plugin.';
		}

add_action( 'admin_init', array( $this, 'deactivate_banned_plugins' ), 10, 0 );
		// Has to be `activated_plugin` and not `activate_plugin`: the latter
		// fires before WordPress writes the `active_plugins` option, so the
		// plugin would not be in the list yet and nothing would be deactivated.
		add_action( 'activated_plugin', array( $this, 'deactivate_banned_plugins' ), 10, 0 );
		add_action( 'admin_notices', array( $this, 'render_notice' ), 10, 0 );
		add_action( 'network_admin_notices', array( $this, 'render_notice' ), 10, 0 );
	}

public function deactivate_banned_plugins() {
		$active_plugins = get_option( 'active_plugins', array() );
		$deactivated    = array();

foreach ( $active_plugins as $plugin ) {
			if ( isset( $this->banned_plugins[ $plugin ] ) ) {
				deactivate_plugins( $plugin );
				$deactivated[ $plugin ] = $this->banned_plugins[ $plugin ];
			}
		}

if ( ! empty( $deactivated ) ) {
			set_transient( self::NOTICE_TRANSIENT, $deactivated, MINUTE_IN_SECONDS );
		}
	}

public function render_notice() {
		$deactivated = get_transient( self::NOTICE_TRANSIENT );

// Keep the transient until somebody who can act on it sees the notice.
		if ( empty( $deactivated ) || ! current_user_can( 'activate_plugins' ) ) {
			return;
		}

delete_transient( self::NOTICE_TRANSIENT );

foreach ( $deactivated as $plugin => $reason ) {
			printf(
				'<div class="notice notice-warning"><p><strong>%s</strong> %s</p></div>',
				esc_html( sprintf( 'The plugin "%s" was deactivated by Raidboxes.', $this->plugin_name( $plugin ) ) ),
				esc_html( $reason )
			);
		}
	}

/**
	 * Human readable plugin name, falling back to the directory name when the
	 * plugin files are not readable (anymore).
	 */
	protected function plugin_name( $plugin ) {
		$data = get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin, false, false );

return empty( $data['Name'] ) ? dirname( $plugin ) : $data['Name'];
	}
}

new RBBannedPluginsPlugin();