WordPress Plugin: Plugin Update Notifications

plugin-update-notifications.php

<?php
/**
 * Plugin Name: Plugin Update Notifications
 * Description: Sends notifications when plugin updates are available via Email, Discord webhook, or ntfy.sh webhook.
 * Version: 1.0
 * Update URI: false
 */

defined('ABSPATH') || exit; // Exit if accessed directly

class Plugin_Update_Notifications {

    // Notification method: 'email', 'discord', or 'ntfy'
    private $notification_method = 'ntfy';

    // Discord webhook URL (replace with your webhook URL)
    private $discord_webhook_url = 'https://discord.com/api/webhooks/123/w3bh00k_t0k3n';

    // ntfy.sh webhook URL (replace with your ntfy.sh URL)
    private $ntfy_webhook_url = 'https://ntfy.sh/miles-cool-plugin-update-demo';

    public function __construct() {
        add_action('set_site_transient_update_plugins', [$this, 'check_plugin_updates']);
    }

    public function check_plugin_updates($transient) {
        if (empty($transient->response)) {
            return;
        }

        $updates_available = [];
        foreach ($transient->response as $plugin_file => $plugin_data) {
            $plugin_info = get_plugin_data(WP_PLUGIN_DIR . '/' . $plugin_file);
            $updates_available[] = $plugin_info['Name'] . ' (' . $plugin_info['Version'] . ' → ' . $plugin_data->new_version . ')';
        }

        if (!empty($updates_available)) {
            $message = "Plugin updates available:\n\n" . implode("\n", $updates_available);
            $this->send_notification($message);
        }
    }

    private function send_notification($message) {
        switch ($this->notification_method) {
            case 'email':
                $this->send_email($message);
                break;
            case 'discord':
                $this->send_discord($message);
                break;
            case 'ntfy':
                $this->send_ntfy($message);
                break;
        }
    }

    private function send_email($message) {
        $subject = 'Plugin Updates Available';
        $admin_email = get_option('admin_email');
        wp_mail($admin_email, $subject, $message);
    }

    private function send_discord($message) {
        $payload = json_encode([
            'username' => 'WP Plugin Notifier',
            'content' => $message
        ]);

        wp_remote_post($this->discord_webhook_url, [
            'headers' => ['Content-Type' => 'application/json'],
            'body' => $payload,
            'timeout' => 10,
        ]);
    }

    private function send_ntfy($message) {
        wp_remote_post($this->ntfy_webhook_url, [
            'body' => $message,
            'timeout' => 10,
        ]);
    }
}

new Plugin_Update_Notifications();