WordPress Dashboard Widgets display active plugins on a site

jd-check-plugin-activity.php

<?php
/**
 * @package jd-check-plugin-activity
 * @version 1.0
 */

/*
Plugin Name: Check Plugin Activity
Plugin URI: https://joseph-dickson.com
Description: Dashboard widgets that display which plugins are active.
Author: Joseph Dickson
Version: 1.0
Author URI: https://joseph-dickson.com
*/

defined( 'ABSPATH' ) or die( 'No script kiddies please!' );

/** 
 * Adapted from https://wordpress.stackexchange.com/questions/54742/how-to-do-i-get-a-list-of-active-plugins-on-my-wordpress-blog-programmatically
 */

/**
 * ## Display Dashbord Widgets 
 *
 * Display Single Site Dashboard Widget
 */
add_action('wp_dashboard_setup', 'jd_dashboard_setup');

function jd_dashboard_setup() {

	// Site Active Plugins
	wp_add_dashboard_widget( 'jd_active_site_plugins', __( 'Active Plugins' ), 'jd_active_site_plugins' );

	// Network Active Plugins
	if( is_multisite() ) {

		wp_add_dashboard_widget( 'jd_active_network_plugins', __( 'Network Active Plugins' ), 'jd_active_network_plugins' );

	}

}

/**
 * Display Multisite Dashboard Widget
 */
add_action('wp_network_dashboard_setup', 'jd_network_dashboard_setup');

function jd_network_dashboard_setup() {

	// Network Active Plugins
	wp_add_dashboard_widget( 'jd_active_network_plugins', __( 'Network Active Plugins' ), 'jd_active_network_plugins' );

	// Sites on this Network
	wp_add_dashboard_widget( 'jd_single_site_plugins', __( 'Plugins Running on the Network' ), 'jd_single_site_plugins' );

}



/**
 * ## Get Activated Plugin Information
 *
 * Locally Activated Plugins
 */


function jd_active_site_plugins() {

	$the_plugins = get_option('active_plugins'); 

	echo '<h1>Activated Plugins</h1>';

	echo '<ul>';

	asort($the_plugins); // sort $the_plugins array and list results alphabetically

	foreach($the_plugins as $key => $value) {
	
		$string = explode('/',$value); // plugin slug will be displayed
		
		echo '<li>'.$string[0] .'</li>';
	}

	echo '</ul>';

}


/**
 * Network Activated Plugins
 */
if( is_multisite() ) {

	function jd_active_network_plugins() {
		$the_plugins = get_site_option('active_sitewide_plugins');
		
		echo '<p>Network activated plugins running on this site.</p>';

		echo '<ul>';

		asort($the_plugins); // sort $the_plugins array and list results alphabetically

		foreach($the_plugins as $key => $value) {
			
			$string = explode('/',$key); // plugin slug will be displayed

			echo '<li>'.$string[0] .'</li>';

			}

		echo '</ul>';

	}
	
}


/**
 * Plugins Activated Locally on Each Site
 */

function jd_single_site_plugins() {
	global $wpdb;

	$blogs = $wpdb->get_results("
		SELECT blog_id
		FROM {$wpdb->blogs}
		WHERE site_id = '{$wpdb->siteid}'
		AND spam = '0'
		AND deleted = '0'
		AND archived = '0'
	");

	echo '<p>Plugins activavted locally on each site.</p>';

	foreach ($blogs as $blog) {

		$the_plugins = get_blog_option( $blog->blog_id, 'active_plugins'); 

		echo '<h1>'. get_blog_option($blog->blog_id, 'blogname') . '</h1>';

		echo '<ul>';

		asort($the_plugins); // sort array and list results alphabetically

		foreach($the_plugins as $key => $value) {
			$string = explode('/',$value); // plugin slug will be displayed
			echo '<li>'.$string[0] .'</li>';
		}
		echo '<hr />';
		echo '</ul>';

	}

}